[Bug 2083657] Please test proposed package

[Andreas Hasenack]

Hello Shih-Yuan, or anyone else affected,

Accepted ubuntu-drivers-common into jammy-proposed. The package will
build now and be available at
https://launchpad.net/ubuntu/+source/ubuntu-drivers-
common/1:0.9.6.2~0.22.04.8 in a few hours, and then in the -proposed
repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
jammy to verification-done-jammy. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-jammy. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

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https://bugs.launchpad.net/bugs/2083657

Title:
  Remove oem-flavour.cfg for the OEM kernel retirement

Status in OEM Priority Project:
  In Progress
Status in ubuntu-drivers-common package in Ubuntu:
  Won't Fix
Status in ubuntu-drivers-common source package in Jammy:
  Fix Committed

Bug description:
  [ Impact ]

   * This issue affects all Ubuntu OEM preloaded systems that are still utilizing the OEM kernel, particularly those equipped with NVIDIA graphics drivers.
   * Systems may fail to boot properly due to an outdated OEM kernel conflicting with newer NVIDIA drivers, leading to a black screen on reboot.

  [ Test Plan ]

  * To verify the fix, ensure that the file `/etc/default/grub.d/oem-flavour.cfg` is successfully removed from the affected system after applying the update.
  * After the system reboots, check that it boots into the general HWE kernel rather than the OEM kernel.

  * Idempotency Testing:
    - Perform the upgrade multiple times on the same system to verify that the upgrade process is idempotent, ensuring that repeated upgrades do not result in unexpected behavior or changes.

  * Non-OEM System Testing:
    - Test the upgrade on a system without OEM kernels to ensure that the upgrade does not affect systems that are not preloaded with the OEM kernel.
    - Confirm that the system continues to function normally and boots into the correct kernel after the update.

  [ Where problems could occur ]

   * Removing `/etc/default/grub.d/oem-flavour.cfg` may cause systems relying on the OEM kernel for specific hardware compatibility to lose access to certain OEM-specific optimizations.
   * There is a low risk that after removing the OEM kernel, some hardware features may not function as expected if the general HWE kernel does not fully support them.

  [ Other Info ]

   * This patch is targeted only for Ubuntu 22.04 and its associated OEM kernels.
   * The issue is specific to systems using NVIDIA drivers in conjunction with an outdated OEM kernel, which conflicts with updates to the HWE kernel and NVIDIA packages.

  1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> About $ lsb_release -rd
  Description:	Ubuntu 22.04.4 LTS
  Release:	22.04
  $ ubuntu-report show | grep DCD
      "DCD": "canonical-oem-sutton-jammy-amd64-20240606-874"

  2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center
  $ apt-cache policy ubuntu-drivers-common
  ubuntu-drivers-common:
    Installed: 1:0.9.6.2~0.22.04.6
    Candidate: 1:0.9.6.2~0.22.04.7
    Version table:
       1:0.9.6.2~0.22.04.7 500
          500 http://tw.archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages
   *** 1:0.9.6.2~0.22.04.6 100
          100 /var/lib/dpkg/status
       1:0.9.6.1 500
          500 http://tw.archive.ubuntu.com/ubuntu jammy/main amd64 Packages

  3) What you expected to happen

   * The system should seamlessly upgrade NVIDIA drivers and the HWE
  kernel without breaking the boot process. The system should boot into
  the latest supported HWE kernel without encountering compatibility
  issues with the NVIDIA drivers.

  4) What happened instead

   * After unattended-upgrades, the system rebooted into the OEM kernel,
  which is outdated and incompatible with the new NVIDIA drivers. As a
  result, the screen remained black upon reboot.

  We need to remove /etc/default/grub.d/oem-flavour.cfg to avoid the
  system booting from deprecated OEM kernels.

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