ChromeOS firmware testing

Prerequisites

  • A Chrome OS device.

  • A device to test that is supported by the installed version of fwupd in Chrome OS, i.e. the device firmware update plugin is working.

Prepare Chrome OS for testing

Pre-conditions

  1. The Chrome-based device must be updated to the recent version of Chrome OS (see official documentation: https://chromium.googlesource.com/chromiumos/docs/+/main/developer_guide.md#Installing-Chromium-OS-on-your-Device )

  2. WiFi connection with unrestricted access to LVFS site.

  3. For reference, we have used Samsung Galaxy Chromebook 2 (codename hatch).

Developer Mode

The Chrome-based device must be switched to development mode: https://chromium.googlesource.com/chromiumos/docs/+/main/developer_mode.md#dev-mode

  1. Recovery mode : Hold Esc + Refresh chromeos-refresh and press Power.

  2. Enter Developer Mode :

    1. On screen “Please insert a recovery USB stick or SD card.” press “Ctrl+D”.

    2. By pressing “Enter” confirm turning OS verification OFF.

    3. The system will be restarted.

    4. After that step on every boot the OS will warn you about OS verification disabled. Press “Ctrl+D” to proceed.

    5. The first boot after restart will set your device into Developer Mode, all data on the device will be wiped out!

  3. During the first boot, set the network and log into the account.

  4. Go to Settings and check IP address assigned to your device:

    _images/chromeos-settings-network.png

  5. The IP address will be used for remote access to the device over SSH – for instance 192.168.1.115 it is assigned.

Disable rootfs verification

By default the filesystem is mounted in ReadOnly mode. For testing purposes we have to do some changes in configuration, meaning we have to disable rootfs verification.

  1. Switch to the linux console on ChromeBook by pressing: “Ctrl + Alt + →” ( ‘→’ or ‘F2’ on top row).

  2. You should see the login prompt asking for login.

  3. Use username “chronos” for login, password is not needed.

  4. Run command to remove the FS verification:

    sudo /usr/share/vboot/bin/make_dev_ssd.sh --remove_rootfs_verification

    1. Sometimes the command above fails and asks to provide additional parameter “ –partitions ” with the partition ID.

      Please check the output carefully:

      _images/chromeos-rootfs-1.png

    2. For hatch the script is suggesting the 2-nd partition, so need to retry the command with suggested parameter:

      sudo /usr/share/vboot/bin/make_dev_ssd.sh --remove_rootfs_verification --partitions 2
      _images/chromeos-rootfs-2.png

  5. Reboot the system with command:

    sudo reboot

Allow fwupd access to HID devices for ChromeOS versions prior to v107

ChromeOS versions prior to version 107 have an issue with managing the HID devices like mice or keyboard. In this case we need to avoid this restriction.

  1. Switch to linux console on ChromeBook by pressing: “Ctrl + Alt + →”

  2. You should see the login prompt asking for login.

  3. Use username “chronos” for login, no password should be asked.

  4. Run command to give access to HID and fwupd:

    sudo usermod -a -G hidraw fwupd

  5. Restart the fwupd with the  command:

    sudo restart fwupd

Enable SSH access

It is recommended to enable SSH access allowing QA engineer remote connection to the ChromeBook instead of typing all commands directly.

  1. Switch to linux console on ChromeBook by pressing: “Ctrl + Alt + →”

  2. You should see the login prompt asking for login.

  3. Use username “chronos” for login, no password should be asked.

  4. Run command to enable SSH access:

    sudo /usr/libexec/debugd/helpers/dev_features_ssh

  5. Set password for the root user:

    sudo passwd

    password test0000 is recommended as default for ChromeOS devices under the test.

  6. Reboot the system with command:

    sudo reboot

  7. Now it is possible to use remote access with SSH tool to the Chromebook from your Linux host using the password above:

    $ ssh root@192.168.1.115
Password:
localhost ~ #

Pack a fresh firmware into the CAB format

The CAB file is the container containing the firmware file and XML file with the metadata for LVFS and fwupd update daemon.

For the purpose of this documentation we will use the ColorHug open hardware colorimeter.

Firmware files

ColorHug  device uses the following firmware file:

firmware.bin

Metadata files

The metadata format is described in documentation: https://lvfs.readthedocs.io/en/latest/metainfo.html

For composite devices, both LVFS and fwupd allow the use of a single CAB file. In this case we have to prepare and pack several XML files with metadata, one file for each firmware.

In the case of ColorHug, only one metadata file is requested:

firmware.metainfo.xml

The name of the files doesn’t matter – the only requirement is the extension .metainfo.xml.

Metainfo file for ColorHug

The metainfo firmware.metainfo.xml file for the device:

<?xml version="1.0" encoding="UTF-8"?>
<component type="firmware">
  <id>com.hughski.ColorHug.firmware</id>
  <name>ColorHug</name>
  <summary>Firmware for the Hughski ColorHug Colorimeter</summary>
  <description>
    <p>
      Updating the firmware on your ColorHug device improves performance and adds new features.
    </p>
  </description>
  <provides>
    <firmware type="flashed">40338ceb-b966-4eae-adae-9c32edfcc484</firmware>
  </provides>
  <url type="homepage">http://www.hughski.com/</url>
  <metadata_license>CC0-1.0</metadata_license>
  <project_license>GPL-2.0-or-later</project_license>
  <categories>
    <category>X-Device</category>
  </categories>
  <custom>
    <value key="LVFS::VersionFormat">triplet</value>
    <value key="LVFS::UpdateProtocol">com.hughski.colorhug</value>
  </custom>
  <releases>
    <release version="1.2.6.1" date="2016-12-02" urgency="low">
      <description>
        <p>This release fixes prevents the firmware returning an error when the remote SHA1 hash was never sent.</p>
      </description>
      <url type="source">https://github.com/hughski/colorhug1-firmware/releases/tag/1.2.6</url>
    </release>
  </releases>
</component>

Important tags explanation

Both metadata XML above contains the minimal amount of data. The most interesting tags are:

  • <id>  – the name of AppStream unique identifier for the device. Vendor must choose the unique string in reverse-DNS style and this ID must contain the device name and .firmware suffix

  • <name>  – this is the short name of the device

    • <name_variant_suffix>  – for composite devices, this is added to short name

  • <firmware>  – the GUID in this tag is extremely important! It helps fwupd to recognize the updatable device. See the output from fwupdmgr get-devices for devices GUIDs. It is allowed to use several GUIDs here if the same update file fits for several devices.

  • <value key=”LVFS::UpdateProtocol”>  – here should be used the name of the protocol supported by the colorhug plugin (see README.md for actual protocols supported).

  • urgency=”low”  – the urgency field has no effect on fwupd itself. This is the hint for UI frontends how to notify users, Gnome Software center for instance. At the moment Chrome OS has very limited UI support for device updates. The upstream is expecting following values:

    Value

    Meaning

    low

    Low importance

    medium

    Medium importance, e.g. optional update

    high

    High importance, e.g. recommended update

    critical

    Critical importance, e.g. urgent or security issue

Generation of the CAB file

The generation of the CAB file is required for uploading to LVFS and for local testing as well. The gcab tool is used for the generation under Linux:

$ gcab --create --nopath --verbose ColorHug-1.2.6.cab firmware.metainfo.xml firmware.bin

The ColorHug-1.2.6.cab will be created containing 2 files: 1 metadata XML and 1 firmware binary.

The generated file will contain only the minimal amount of the metadata. No additional information for firmwares validation, checksums or signatures are included at this step!

Upload file to ChromeBook

To test the generated file you need to copy it onto a ChromeBook device. The simplest method is to copy it via ssh from the build host. Please substitute the IP address from the example below with the IP address of your device, and use the password you’ve set during ChromeBook setup (test0000 in the example):

$ scp ColorHug-1.2.6.cab root@192.168.1.115:~/
Password:

Alternatively you may want to use other methods for accessing the CAB file from ChromeBook device, for instance: own HTTP server, network share, USB mass storage and others.

Local test of the CAB file

Access to ChromeBook

Gain terminal access on ChromeBook via ssh (recommended) or with virtual console.

SSH method

Use ssh tool from your host to login as root user to ChromeBook (use IP address of your device and password you’ve set):

$ ssh root@192.168.1.115
Password:
localhost ~ #

Physical access method

  1. Switch to the linux console on ChromeBook by pressing: “Ctrl + Alt + →” ( ‘→’ or ‘F2’ on top row).

  2. You should see the login prompt asking for login.

  3. Use username root for login, and password you’ve set (test0000 by default):

    localhost login: root
Password:
localhost ~ #

Virtual console via crosh

  1. Start crosh terminal by pressing “Ctrl + Alt + T” in GUI

  2. In the opened terminal window type shell command

  3. Switch to root account

    crosh> shell
chronos@localhost / $ sudo bash
localhost / #

Check if the device is supported by fwupd

  • Attach the device to ChromeBook

  • Collect information about the attached device, supported by colorhug plugin:

    localhost ~ # fwupdmgr get-devices
Nightfury
│
├─ColorHug:
│         Device ID:         d9c9e0eb29c6f35160d400949c14db42f473f4d4
│         Summary:           An open source display colorimeter
│         Current version:   1.2.5
│         Vendor:            Hughski Ltd. (USB:0x273F)
│         Install Duration:  8 seconds
│         GUIDs:             40338ceb-b966-4eae-adae-9c32edfcc484
│                            afdcc391-6c33-5914-b4d2-b4dd71fe9c5a
│                            6bc5ff27-d631-5660-9991-6d24954c6f90 ← USB\VID_273F&PID_1001
│                            4841a9e4-e5c8-5107-a83e-d6c6d9c21248 ← USB\VID_273F&PID_1001&REV_0002
│         Device Flags:      • Updatable
│                            • Supported on remote server
│                            • Device can recover flash failures
│                            • Unsigned Payload

The most interesting here are device GUID(s) and device flags: Updatable meaning that the device updates are supported by fwupd manager, and Supported on remote server flag shows there are firmwares available on the LVFS site.

Upgrade the device with development FW CAB file

As mentioned above, the development variant of locally generated CAB file was not digitally signed, so it is not possible to install it on Chrome OS based devices with the fwupdmgr tool due security reasons:

localhost ~ # fwupdmgr local-install --allow-reinstall --allow-older ColorHug-1.2.6.cab --json
firmware signature missing or not trusted; set OnlyTrusted=false in /etc/fwupd/daemon.conf ONLY if you are a firmware developer

To avoid that issue it is possible to use 2 methods:

  1. Modify /etc/fwupd/daemon.conf to allow untrusted firmwares, and restart the daemon:

    localhost ~ # restart fwupd

    This method is suitable for developers only who are testing the new FW and not recommended for other purposes .

    Warning

    This should never be done on production machines.

  2. Use standalone fwupdtool tool to update the device with development CAB file:

    localhost ~ # fwupdtool install --allow-reinstall --allow-older ColorHug-1.2.6.cab --json

Upgrade the device through internal repository

By default Chromium OS has a local vendors repository enabled (see /etc/fwupd/remotes.d/vendor-directory.conf), so any CAB file placed into the local directory /usr/share/fwupd/remotes.d/vendor/firmware will be automatically detected and could be used for the device upgrade or downgrade:

localhost ~ # cp ColorHug-1.2.6.cab /usr/share/fwupd/remotes.d/vendor/firmware/

Note

Please check the Updates with LVFS section below how to update or downgrade the firmware with the GUI or CLI.

LVFS

Chromium OS does not use the Linux Vendor Firmware Service (LVFS) for secure updates directly.

Instead Google is using its own mirror copied from the LVFS stable remote.

That’s why we have to add LVFS remotes to the Chrome OS device during the testing.

Account

Please request the access to LVFS portal according the https://lvfs.readthedocs.io/en/latest/apply.html

LVFS: remotes

There are 4 LVFS remotes available for the CAB file uploading:

  • private  – should be the initial remote for uploading, the CAB file with FW uploaded to private could be accessible only via direct link

  • embargo  – remote with non-public catalog of FWs available for Vendor only; used during development and QA testing. The remote may be added to the Chrome OS just like a common remote, so all fwupd functionality is available for testing.

    Should be used for testing by Vendor before giving access to FW to end-users.

  • testing  – this remote is generally available for end users, encouraged enough to deal with the potential risk of the freshest FW version.

  • stable  – the main remote with released FW considered as good enough for the mass market.

    This remote is enabled by default on Chrome OS and Linux systems with installed fwupd.

CAB file repacking

The uploaded CAB file would be repacked on the LVFS side:

  • The metadata is validated during this step.

  • Missing parts would be added into metadata if not provided by metadata XML file, checksums for instance.

  • The signature will be added to FW and metadata. Only signed CAB files are trusted by default on end-user devices.

Any change of the metadata in the internal editor will cause repackage and resignation of the CAB file, so the new file will be generated.

LVFS: private remote

Upload the FW CAB file to LVFS private remote

  1. Go to section “Firmware” -> “Upload new”

  2. Select the generated CAB file from your host

  3. Choose your vendor name (Collabora in example)

  4. Choose “Private” remote

  5. Press “Upload”

  6. The page will be refreshed

  7. Scroll down to the “Previous uploads” section, you should see the confirmation with the date, filename and the status of uploaded file

  8. Refresh the web page until “Complete” status

  9. Press “Details” button

    _images/chromeos-lvfs-1.png
    _images/chromeos-lvfs-2.png

Install the FW CAB file from the private remote

The private remote doesn’t provide the catalog with uploaded files. Instead you have to go to the CAB file you are interested in and get its URL for the direct download and install.

  1. Choose the needed firmware from private repo (“Firmware” -> “State::Private”) and press the button details.

    _images/chromeos-lvfs-3.png

  2. In the “Details” tab you will see the “Overview” block with the name of the uploaded firmware. The right click (or long press) will give you the URL of the signed CAB file.

    _images/chromeos-lvfs-4.png

  3. Gain access to the Chrome OS device terminal as described in the Access to ChromeBook section.

  4. Via terminal install the CAB file from the LVFS by copied URL:

    # fwupdmgr install https://fwupd.org/downloads/c6fbb716abbb204d98f12edf1f146b6406f39b1eade741b353c15a86f5da8278-hughski-colorhug-1.2.6.cab
Waiting…                 [***************************************] Less than one minute remaining…
Successfully installed firmware

LVFS: Embargo remote

The embargoed remote provides the catalog of available firmwares but it is restricted to vendor, so only the vendor is able to use it or share for 3-rd parties.

Move the FW CAB file to embargoed remote

  1. Choose the needed firmware from private repo (“Firmware” -> “State::Private”) and press the button details.

    _images/chromeos-lvfs-3.png

  2. In the “Target” tab you will see the list of available remotes.

    Press “Move here” button for “Embargo” remote:

    _images/chromeos-lvfs-5.png

  3. On the updated screen you need to scroll down the web page to “History” block to see the confirmation if the FW has been moved into the new remote:

    _images/chromeos-lvfs-6.png

Enable the embargoed remote

This is the one-time action needed for enabling the Embargo remote on the testing Chrome OS system.

  1. Check on Chrome OS device if the remote is not available and not enabled already:

    # fwupdmgr get-remotes

    If there is the remote named Embargoed for collabora or similar and it is enabled (check the key Enabled: true), probably the remote is configured already and you may proceed with Install the FW CAB file from the embargo remote .

  2. On LVFS site find the section “Metadata” – it would contain links to the recent versions of metadata for Embargo, Testing and Stable repositories.

    However we are interesting in the configuration file for the Embargo remote of your company (collabora-embargo.conf in the example)

    _images/chromeos-lvfs-7.png

  3. Download the configuration file for the embargoed remote by clicking the name.

    Please keep in mind – this is the private file accessible for authorized users only!

  4. You need to copy the downloaded file to the ChromeBook with any method available for you (mass-media device, ssh and others).

    To copy the file from the workstation with ssh, for instance:

    scp collabora-embargo.conf root@192.168.1.115:~/

    Please use the correct file name and IP address of the target device!

  5. On Chrome OS device you need to copy the file to configuration directory for fwupd daemon:

    # cp -v collabora-embargo.conf /etc/fwupd/remotes.d/

  6. Restart  the fwupd service on ChromeBook:

    # restart fwupd
fwupd start/running, process 22697

Install the FW CAB file from the embargo remote

  1. Refresh the metadata for embargoed remote:

    # fwupdmgr refresh
Updating collabora-embargo
Downloading…             [***************************************]
Downloading…             [***************************************]
Downloading…             [***************************************]
Decompressing…           [***************************************]
Successfully downloaded new metadata: 6 local devices supported

  2. Update with the FW available from Embargo remote:

    # fwupdmgr update
Devices with no available firmware updates:
• DUTA42
• Generic Billboard Device
╔══════════════════════════════════════════════════════════════════════╗
║ Upgrade ColorHug from 1.2.5 to 1.2.6?                                ║
╠══════════════════════════════════════════════════════════════════════╣
║ This release fixes prevents the firmware returning an error when the ║
║ remote SHA1 hash was never sent.                                     ║
║                                                                      ║
║ ColorHug and all connected devices may not be usable while updating. ║
╚══════════════════════════════════════════════════════════════════════╝
Perform operation? [Y|n]: Y
Downloading…             [***************************************]
Downloading…             [***************************************] Less than one minute remaining…
Downloading…             [***************************************]
Decompressing…           [***************************************]
Authenticating…          [***************************************]
Waiting…                 [***************************************] Less than one minute remaining…
Successfully installed firmware

LVFS: Testing remote

The Testing remote provides the catalog of firmwares for public access, however only users explicitly enabled this remote will have access to published FWs.

Move the FW CAB file to testing remote

LVFS side is similar to Move the FW CAB file to embargoed remote , but the target is “Testing remote” and no need to download the file with remote configuration.

Enable testing remote

This is the one-time action needed for enabling the Testing remote for the Chrome OS system.

By default the Testing remote is already configured on Chrome OS but not enabled.

  1. Check on Chrome OS device if the remote named Linux Vendor Firmware Service (testing) is not enabled already:

    # fwupdmgr get-remotes

    Check the key Enabled: and if it is set to true please proceed with Install the FW CAB file with the testing remote

  2. To enable the testing remote, use text editor to edit configuration file to replace Enabled=false by Enabled=true in /etc/fwupd/remotes.d/lvfs-testing.conf or simply run the command below:

    # sed -i -e "s/^Enabled=false/Enabled=true/" /etc/fwupd/remotes.d/lvfs-testing.conf

  3. Restart the fwupd daemon:

    # restart fwupd
fwupd start/running, process 9841

Install the FW CAB file with the testing remote

  1. Refresh the metadata for testing remote:

    #  fwupdmgr refresh
Updating lvfs-testing
Downloading…             [***************************************]
Downloading…             [***************************************]
Successfully downloaded new metadata: 2 local devices supported

  2. Update with the latest available FW from the testing remote:

    #  fwupdmgr update
Devices with no available firmware updates:
• DUTA42
• Generic Billboard Device
╔══════════════════════════════════════════════════════════════════════╗
║ Upgrade ColorHug from 1.2.5 to 1.2.6?                                ║
╠══════════════════════════════════════════════════════════════════════╣
║ This release fixes prevents the firmware returning an error when the ║
║ remote SHA1 hash was never sent.                                     ║
║                                                                      ║
║ ColorHug and all connected devices may not be usable while updating. ║
╚══════════════════════════════════════════════════════════════════════╝
Perform operation? [Y|n]: Y
Downloading…             [***************************************]
Downloading…             [***************************************]
Authenticating…          [***************************************]
Waiting…                 [***************************************] Less than one minute remaining…
Successfully installed firmware

LVFS: Stable remote

The Stable remote makes the FW available for all users of fwupd over the World running on different operating systems (primarily Linux).

For the Chrome OS this repository isn’t enabled by default, so it is needed to enable Stable remote explicitly. This makes the stable remote similar to the testing one for the Chrome OS.

Google’s team is keeping its own mirror of LVFS, so the FW from the LVFS Stable remote will be published for Chrome OS users only after some time.

Move the FW CAB file to stable remote

LVFS side is similar to Move the FW CAB file to embargoed remote, but the target is “Stable remote” and no need to download the file with remote configuration.

Enable stable remote

This is the one-time action needed for enabling the stable remote for the Chrome OS system.

By default the stable remote is already configured on Chrome OS but not enabled.

  1. Check on Chrome OS device if the remote named Linux Vendor Firmware Service is not enabled already:

    # fwupdmgr get-remotes

    Check the key Enabled: and if it is set to true please proceed with

  2. Enable the stable remote, use text editor to edit configuration file to replace Enabled=false by Enabled=true in /etc/fwupd/remotes.d/lvfs.conf or simply run the command below:

    # sed -i -e "s/^Enabled=false/Enabled=true/" /etc/fwupd/remotes.d/lvfs.conf

  3. Restart the fwupd daemon:

    # restart fwupd
fwupd start/running, process 20199

Install the FW CAB file with the stable remote

  1. Refresh the metadata for stable remote:

    # fwupdmgr refresh
Updating lvfs
Downloading…             [***************************************]
Downloading…             [***************************************]
Decompressing…           [***************************************]
Successfully downloaded new metadata: 0 local devices supported

  2. Update with the latest available FW from the stable remote :

    # fwupdmgr update

Persistent revisions

Mark all FW versions uploaded to LVFS and used for automatic tests as persistent (“preserve” button in LVFS).

This is needed to keep the uploaded versions used for tests and prevent from purging on the LVFS side.

Signed Reports

The firmware testing is described in documentation: https://lvfs.readthedocs.io/en/latest/testing.html#signed-reports .

After each update the fwupdmgr client tools allow the end user to submit a “report” which is used by the firmware owner to validate the firmware deployment is correct. Any failures can be analyzed and patterns found and the metadata can be fixed. For instance, the failures might indicate that the required fwupd version needs to be raised to a higher value, or that the update requires a specific bootloader version.

It is expected that only F/W having signed reports would be automatically copied into the LVFS mirror for Chrome OS. To do this, the user must either upload the certificate from each machine used for testing, or hardcode a user token.

Uploading a signed report on ChromeOS is slightly different than on regular Linux distributions as /etc is immutable and cannot be changed. By creating a file /var/lib/fwupd/remotes.d/lvfs.conf in a mutable directory the fwupd daemon will reload the information and disregard the immutable /etc/fwupd/remotes.d/lvfs.conf contents.

[fwupd Remote]
Enabled=true
Title=Linux Vendor Firmware Service
MetadataURI=https://cdn.fwupd.org/downloads/firmware-EMBARGO_HASH.xml.xz
ReportURI=https://fwupd.org/lvfs/firmware/report
Username=THE_USERNAME
Password=THE_TOKEN

Where EMBARGO_HASH is the hash found in https://fwupd.org/lvfs/metadata/

The THE_USERNAME is your LVFS account email and THE_TOKEN is the token generated in https://fwupd.org/lvfs/profile

To use a host certificate rather than hardcoding Username and Password:

  1. Go to the “Profile Settings”

  2. Upload the fwupd certificate

    _images/chromeos-lvfs-profile-settings.png
    _images/chromeos-lvfs-client-certificates.png

    Warning

    The metadata must now be downloaded from the embargo remote using fwupdmgr refresh otherwise the message has no RemoteID will be seen using fwupdmgr report-history --verbose

The user can then upload reports to the LVFS in a trusted way by signing the report:

$ fwupdmgr update # or fwupdmgr install foo.cab
# …reboot if required…

If using a Username and Password, you must use:

$ fwupdmgr report-history

If using a host certificate, you must use:

$ fwupdmgr report-history --sign

USB device update record

Since fwupd version 1.8.11 it is possible to record the firmware update of the USB devices. This can be used for a failing update to allow the plugin developer to replay the update for debugging purposes .

Device record

  1. Check the device availability and version

    # fwupdmgr get-devices

  2. Enable device emulation support, use text editor to edit configuration file to replace AllowEmulation=false by AllowEmulation=true in /etc/fwupd/daemon.conf or simply run the command below:

    # sed -i -e "s/^ AllowEmulation =false/ AllowEmulation =true/" /etc/fwupd/daemon.conf

  3. Restart the fwupd daemon:

    # restart fwupd
fwupd start/running, process 20199

  4. Copy the “Device ID:” or “GUID” value from the target device, for example:

    ├─ColorHug:
│         Device ID:         23cf6368c14a875f74c38a5a423518f38d8abbbc
│         Summary:           An open source display colorimeter
│         Current version:   1.2.5
│         Vendor:            Hughski Ltd. (USB:0x273F)
│         Install Duration:  8 seconds
│         GUIDs:             40338ceb-b966-4eae-adae-9c32edfcc484
│                            afdcc391-6c33-5914-b4d2-b4dd71fe9c5a

    The Device ID is unique per device!!!

  5. Register the device for recording using the “Device ID”:

    # fwupdmgr emulation-tag 23cf6368c14a875f74c38a5a423518f38d8abbbc

    or the “GUID”:

    # fwupdmgr emulation-tag 40338ceb-b966-4eae-adae-9c32edfcc484

  6. Remove and re-insert the device.

  7. Upgrade the device to the newer version:

    # fwupdmgr update

  8. Save the records to an emulation file:

    # fwupdmgr emulation-save colorhug.zip

  9. Unregister the device:

    #  fwupdmgr emulation-untag 23cf6368c14a875f74c38a5a423518f38d8abbbc

  10. Disable device emulation support, use text editor to edit configuration file to replace AllowEmulation=true by AllowEmulation=false in /etc/fwupd/daemon.conf or simply run the command below:

    # sed -i -e "s/^ AllowEmulation =true/ AllowEmulation =false/" /etc/fwupd/daemon.conf

  11. Restart the fwupd daemon:

    #  restart fwupd
fwupd start/running, process 20199

The emulation file can now be sent to the plugin developer.

Device emulation

  1. Enable device emulation support, use text editor to edit configuration file to replace AllowEmulation=false by AllowEmulation=true in /etc/fwupd/daemon.conf or simply run the command below:

    # sed -i -e "s/^ AllowEmulation =false/ AllowEmulation =true/" /etc/fwupd/daemon.conf

  2. Restart the fwupd daemon:

     # restart fwupd
fwupd start/running, process 20199

  3. Load the emulated device:

    # fwupdmgr emulation-load colorhug.zip

  4. Check the device availability and version

    localhost ~ # fwupdmgr get-devices
Nightfury
│
├─ColorHug:
│         Device ID:         d9c9e0eb29c6f35160d400949c14db42f473f4d4
│         Summary:           An open source display colorimeter
│         Current version:   1.2.5
│         Vendor:            Hughski Ltd. (USB:0x273F)
│         Install Duration:  8 seconds
│         GUIDs:             40338ceb-b966-4eae-adae-9c32edfcc484
│                            afdcc391-6c33-5914-b4d2-b4dd71fe9c5a
│                            6bc5ff27-d631-5660-9991-6d24954c6f90 ← USB\VID_273F&PID_1001
│                            4841a9e4-e5c8-5107-a83e-d6c6d9c21248 ← USB\VID_273F&PID_1001&REV_0002
│         Device Flags:      • Updatable
│                            • Supported on remote server
│                            • Device can recover flash failures
│                            • Unsigned Payload
│                            • Emulated

  5. Upgrade the device to the newer version:

    # fwupdmgr update

  6. Disable device emulation support, use text editor to edit configuration file to replace AllowEmulation=true by AllowEmulation=false in /etc/fwupd/daemon.conf or simply run the command below:

    # sed -i -e "s/^ AllowEmulation =true/ AllowEmulation =false/"
/etc/fwupd/daemon.conf

  7. Restart the fwupd daemon:

    # restart fwupd
fwupd start/running, process 20199

Updates with LVFS

Update with GUI

  1. Go to “Settings”

  2. Press “About Chrome OS” and if the update is available – find the button “Firmware updates” and press it:

    _images/chromeos-settings-fw-update.png

  3. If the update for the connected device is available you will see it in the list of pop-up window and will be able to update:

    _images/chromeos-settings-available-update.png

  4. In case of successful update you should to see the appropriate message:

    _images/chromeos-settings-fw-uptodate.png

  5. If something goes wrong during update, the error message should appeared:

    _images/chromeos-settings-fw-error.png

Update with console

Check the device availability and version

Run the command fwupdmgr get-devices to gain the list of attached devices.

#  fwupdmgr get-devices
Nightfury
│
├─ColorHug:
│         Device ID:         23cf6368c14a875f74c38a5a423518f38d8abbbc
│         Summary:           An open source display colorimeter
│         Current version:   1.2.5
│         Vendor:            Hughski Ltd. (USB:0x273F)
│         Install Duration:  8 seconds
│         Update State:      Success
│         GUIDs:             40338ceb-b966-4eae-adae-9c32edfcc484
│                            afdcc391-6c33-5914-b4d2-b4dd71fe9c5a
│                            6bc5ff27-d631-5660-9991-6d24954c6f90 ← USB\VID_273F&PID_1001
│                            4841a9e4-e5c8-5107-a83e-d6c6d9c21248 ← USB\VID_273F&PID_1001&REV_0002
│         Device Flags:      • Updatable
│                            • Supported on remote server
│                            • Device can recover flash failures
│                            • Unsigned Payload

Update the selected device

It is possible to update the single selected device by Device ID listed in Check the device availability to the last available FW version:

# fwupdmgr update 23cf6368c14a875f74c38a5a423518f38d8abbbc
Devices with no available firmware updates:
• DUTA42
• Generic Billboard Device
╔═══════════════════════════════════════════════════════════════════════════╗
║ Upgrade ColorHug from 1.2.5 to 1.2.6?                                     ║
╠═══════════════════════════════════════════════════════════════════════════╣
║ This release fixes prevents the firmware returning an error when the      ║
║ remote SHA1 hash was never sent.                                          ║
║                                                                           ║
║ ColorHug and all connected devices may not be usable while updating.      ║
╚═══════════════════════════════════════════════════════════════════════════╝
Perform operation? [Y|n]:
Downloading…             [***************************************]
Downloading…             [***************************************]
Authenticating…          [***************************************]
Waiting…                 [***************************************]
Successfully installed firmware

Update all supported devices

If you want to update all supported devices attached to the ChromeBook, just run fwupdmgr update to apply any FW update available from the enabled remote:

#  fwupdmgr update
Devices with no available firmware updates:
• DUTA42
• Generic Billboard Device
╔═══════════════════════════════════════════════════════════════════════════╗
║ Upgrade ColorHug from 1.2.5 to 1.2.6?                                     ║
╠═══════════════════════════════════════════════════════════════════════════╣
║ This release fixes prevents the firmware returning an error when the      ║
║ remote SHA1 hash was never sent.                                          ║
║                                                                           ║
║ ColorHug and all connected devices may not be usable while updating.      ║
╚═══════════════════════════════════════════════════════════════════════════╝
Perform operation? [Y|n]: y
Downloading…             [***************************************]
Downloading…             [***************************************]
Decompressing…           [***************************************]
Authenticating…          [***************************************]
Waiting…                 [***************************************] Less than one minute remaining…
Successfully installed firmware

Downgrade the FW version

If several versions of the FW are available from enabled remote(s) it is possible to perform downgrade to any available version lower than the current by selection via the proposed menu. If only the single version for downgrade is available you will need only to confirm the operation:

# fwupdmgr downgrade 23cf6368c14a875f74c38a5a423518f38d8abbbc
0.    Cancel
1.    1.2.5
2.    1.2.4
3.    1.2.3
4.    1.2.2
5.    1.2.0
Choose release [0-5]: 1
╔═══════════════════════════════════════════════════════════════════════════╗
║ Downgrade ColorHug from 1.2.6 to 1.2.5?                                   ║
╠═══════════════════════════════════════════════════════════════════════════╣
║ This release fixes the firmware package to work with new versions of      ║
║ fwupd.                                                                    ║
║                                                                           ║
║ ColorHug and all connected devices may not be usable while updating.      ║
╚═══════════════════════════════════════════════════════════════════════════╝
Perform operation? [Y|n]:
Downloading…             [***************************************]
Downloading…             [***************************************]
Downloading…             [***************************************]
Authenticating…          [***************************************]
Waiting…                 [***************************************]
Successfully installed firmware

Test cases

For tests in this section please use CAB files listed in section List of FWs used in this doc or prepare own CAB files and upload it to appropriate remote as described in LVFS  section.

Variables for test cases

Most of the test cases are the same for all the HW, only CAB files and versions are different. To unify the test cases for all devices, some variables are defined and used in test cases for any device:

  • OLDCAB  – URL or path to the CAB file of the previous version

  • NEWCAB  – URL or path to the CAB file of the target version

For instance for ColorHug it is required to define URL to CAB files with export command prior the test:

# export OLDCAB=https://fwupd.org/downloads/9a4e77009da7d3b5f15a1388afeb9e5d41a5a8ae-hughski-colorhug2-1.2.5.cab

# export NEWCAB=https://fwupd.org/downloads/c6fbb716abbb204d98f12edf1f146b6406f39b1eade741b353c15a86f5da8278-hughski-colorhug-1.2.6.cab

The example above sets the OLDCAB variable to the URL of the CAB file with FW version 1.2.5, and the NEWCAB to the URL of the CAB file with FW version 1.2.6.

Test the FW from the private remote

Preconditions

Steps

  1. Check the device availability and version

    # fwupdmgr get-devices

  2. Downgrade the device to the older version (parameter --allow-older is mandatory):

    # fwupdmgr install ${OLDCAB} --allow-older

  3. Expected result: last string must be

    Successfully installed firmware

  4. Check the device availability and version

    # fwupdmgr get-devices

    Version of the FW must be equal to older release.

  5. Upgrade the device to the newer version:

    # fwupdmgr install ${NEWCAB}

  6. Expected result: last string must be

    Successfully installed firmware

  7. Check the device availability and version

    # fwupdmgr get-devices

    Version of the FW must be equal to the target release.

Test the FW from the embargoed remote

Preconditions

Steps

  1. Check the device availability and version

    # fwupdmgr get-devices

  2. Downgrade the device to the older version (parameter --allow-older is mandatory):

    # fwupdmgr install ${OLDCAB} --allow-older

  3. Expected result: last string must be

    Successfully installed firmware

  4. Check the device availability and version

    # fwupdmgr get-devices

    Version of the FW must be equal to older release.

  5. Install the FW CAB file from the embargo remote

    1. Refresh the metadata for embargoed remote:

      # fwupdmgr refresh

    2. Expected result: last string must be

      Successfully downloaded new metadata: 6 local devices supported

      where the amount of supported devices might vary

    3. Update with the FW available from Embargo remote:

      # fwupdmgr update

    4. Expected result: last string must be

      Successfully installed firmware

  6. Check the device availability and version

    # fwupdmgr get-devices

    Version of the FW must be equal to the target release.

Test the FW from the testing remote

Preconditions

Steps

  1. Check the device availability and version

    # fwupdmgr get-devices

  2. Downgrade the device to the older version (parameter --allow-older is mandatory):

    # fwupdmgr install ${OLDCAB} --allow-older

  3. Expected result: last string must be

    Successfully installed firmware

  4. Check the device availability and version

    # fwupdmgr get-devices

    Version of the FW must be equal to older release.

  5. Install the FW CAB file with the testing remote

    1. Refresh the metadata for testing remote:

      # fwupdmgr refresh

    2. Expected result: last string must be

      Successfully downloaded new metadata: 6 local devices supported

      where the amount of supported devices might vary

    3. Update with the FW available from Testing remote:

      # fwupdmgr update

    4. Expected result: last string must be

      Successfully installed firmware

  6. Check the device availability and version

    # fwupdmgr get-devices

    Version of the FW must be equal to the target release.

Test the FW from the stable remote

Preconditions

Steps

  1. Check the device availability and version

    # fwupdmgr get-devices

  2. Downgrade the device to the older version (parameter --allow-older is mandatory):

    # fwupdmgr install ${OLDCAB} --allow-older

  3. Expected result: last string must be

    Successfully installed firmware

  4. Check the device availability and version

    # fwupdmgr get-devices

    Version of the FW must be equal to older release.

  5. Install the FW CAB file with the stable remote

    1. Refresh the metadata for stable remote:

      # fwupdmgr refresh

    2. Expected result: last string must be

      Successfully downloaded new metadata: 6 local devices supported

      where the amount of supported devices might vary.

    3. Update with the FW available from Stable remote:

      # fwupdmgr update

    4. Expected result: last string must be

      Successfully installed firmware

  6. Check the device availability and version

    # fwupdmgr get-devices

    Version of the FW must be equal to the target release.

Test GUI update with Google internal remote

Preconditions

Steps

  1. Check the device availability and version

    # fwupdmgr get-devices

  2. Downgrade the device to the older version (parameter --allow-older is mandatory):

    # fwupdmgr install ${OLDCAB} --allow-older

  3. Expected result: last string must be

    Successfully installed firmware

  4. Check the device availability and version

    # fwupdmgr get-devices

    Version of the FW must be equal to older release.

  5. Switch to the Chrome OS UI if you are in linux console:

    switch to the linux console on ChromeBook by pressing: “Ctrl + Alt + ←” (‘←’ or ‘F1’ on top row).

  6. After downgrading it is possible to update the device with GUI to the last available version :

    go to “Settings” -> “About Chrome OS” -> “Firmware update”

Test GUI update with embargoed remote

Preconditions

Steps

  1. Check the device availability and version

    # fwupdmgr get-devices

  2. Downgrade the device to the older version (parameter --allow-older is mandatory):

    # fwupdmgr install ${OLDCAB} --allow-older

  3. Expected result: last string must be

    Successfully installed firmware

  4. Check the device availability and version

    # fwupdmgr get-devices

    Version of the FW must be equal to older release.

  5. Refresh the metadata from the remote:

    # fwupdmgr refresh --force

  6. Switch to the Chrome OS UI if you are in linux console:

    switch to the linux console on ChromeBook by pressing: “Ctrl + Alt + ←” ( ‘←’ or ‘F1’ on top row).

  7. After downgrading it is possible to update the device with GUI to the last available version :

    go to “Settings” -> “About Chrome OS” -> “Firmware update”

Test GUI update with testing remote

Preconditions

Steps

  1. Check the device availability and version

    # fwupdmgr get-devices

  2. Downgrade the device to the older version (parameter --allow-older is mandatory):

    # fwupdmgr install ${OLDCAB} --allow-older

  3. Expected result: last string must be

    Successfully installed firmware

  4. Check the device availability and version

    # fwupdmgr get-devices

    Version of the FW must be equal to older release.

  5. Refresh the metadata from the remote:

    # fwupdmgr refresh --force

  6. Switch to the Chrome OS UI if you are in linux console:

    switch to the linux console on ChromeBook by pressing: “Ctrl + Alt + ←” ( ‘←’ or ‘F1’ on top row).

  7. After downgrading it is possible to update the device with GUI to the last available version :

    go to “Settings” -> “About Chrome OS” -> “Firmware update”

Test GUI update with stable remote

Preconditions

Steps

  1. Check the device availability and version

    # fwupdmgr get-devices

  2. Downgrade the device to the older version (parameter --allow-older is mandatory):

    # fwupdmgr install ${OLDCAB} --allow-older

  3. Expected result: last string must be

    Successfully installed firmware

  4. Check the device availability and version

    # fwupdmgr get-devices

    Version of the FW must be equal to older release.

  5. Refresh the metadata from the remote:

    # fwupdmgr refresh --force

  6. Switch to the Chrome OS UI if you are in linux console:

    switch to the linux console on ChromeBook by pressing: “Ctrl + Alt + ←” ( ‘←’ or ‘F1’ on top row).

  7. After downgrading it is possible to update the device with GUI  to the last available version :

    go to “Settings” -> “About Chrome OS” -> “Firmware update”

Recovery from the failed update with CLI

Preconditions

Steps

  1. Check the device availability and version

    # fwupdmgr get-devices

  2. Downgrade the device to the older version (parameter --allow-older is mandatory):

    # fwupdmgr install ${OLDCAB} --allow-older

  3. Expected result: last string must be

    Successfully installed firmware

  4. Check the device availability and version

    # fwupdmgr get-devices

  5. Copy the “Device ID:” value from the target device, for example:

    ├─ColorHug:
│         Device ID:        23cf6368c14a875f74c38a5a423518f38d8abbbc
│         Summary:          An open source display colorimeter
│         Current version:  1.2.5

    The Device ID is unique per device!!!

  6. Put the device into bootloader mode.

    Please use the ID of the target device detected on the previous step!!!

    # fwupdtool detach 23cf6368c14a875f74c38a5a423518f38d8abbbc

  7. The device must notify it is in bootloader mode with blinking LED.

  8. Check the device availability and version

    # fwupdmgr get-devices

  9. Expected result: the device flag Is in bootloader mode must exists

    ├─ColorHug:
│         Device ID:        23cf6368c14a875f74c38a5a423518f38d8abbbc
│         Summary:          An open source display colorimeter
│         Current version:  1.2.5
│         Vendor:           Hughski Ltd. (USB:0x273F)
│         Install Duration: 8 seconds
│         GUIDs:            40338ceb-b966-4eae-adae-9c32edfcc484
│                           afdcc391-6c33-5914-b4d2-b4dd71fe9c5a
│                           6bc5ff27-d631-5660-9991-6d24954c6f90 ← USB\VID_273F&PID_1001
│                           4841a9e4-e5c8-5107-a83e-d6c6d9c21248 ← USB\VID_273F&PID_1001&REV_0002
│         Device Flags:     • Updatable
│                           • Supported on remote server
│                           • Device can recover flash failures
│                           • Is in bootloader mode
│                           • Unsigned Payload

  10. Upgrade the device to the newer version:

    # fwupdmgr install ${NEWCAB}

  11. Expected result: last string must be

    Successfully installed firmware

  12. Check the device availability and version

    # fwupdmgr get-devices

    Version of the FW must be equal to the target release.

Test the FW reinstall

Preconditions

7.11.2. Steps

  1. Check the device availability and version

    # fwupdmgr get-devices

  2. Update the device to the target CAB:

    # fwupdmgr install ${NEWCAB}

  3. Expected result: last string must be either

    Successfully installed firmware…

    OR

    All updatable firmware is already installed

  4. Check the device availability and version

    # fwupdmgr get-devices

    Version of the FW must be equal to the target release.

  5. Re-install the FW for all subdevices with the target release:

    # fwupdmgr install ${NEWCAB} --allow-reinstall

  6. Expected result: last string must be

    Successfully installed firmware

  7. Check the device availability and version

    # fwupdmgr get-devices

    Version of the FW must be equal to the target release.

Appendix A: List of FWs used in this doc

This is the list of FWs uploaded to LVFS and available for downloading and testing.

ColorHug

  1. 1.2.5

    https://fwupd.org/downloads/9a4e77009da7d3b5f15a1388afeb9e5d41a5a8ae-hughski-colorhug2-1.2.5.cab

  2. 1.2.6

    https://fwupd.org/downloads/c6fbb716abbb204d98f12edf1f146b6406f39b1eade741b353c15a86f5da8278-hughski-colorhug-1.2.6.cab

# export OLDCAB=https://fwupd.org/downloads/9a4e77009da7d3b5f15a1388afeb9e5d41a5a8ae-hughski-colorhug2-1.2.5.cab

# export NEWCAB=https://fwupd.org/downloads/c6fbb716abbb204d98f12edf1f146b6406f39b1eade741b353c15a86f5da8278-hughski-colorhug-1.2.6.cab