debcrafters-packages team mailing list archive

[Timo Aaltonen <2124220@xxxxxxxxxxxxxxxxxx>]

Hello Tony, or anyone else affected,

Accepted gdm3 into noble-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/gdm3/46.2-1ubuntu1~24.04.2 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-
noble to verification-done-noble. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-noble. 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.

** Changed in: gdm3 (Ubuntu Noble)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-noble

-- 
You received this bug notification because you are a member of
Debcrafters packages, which is subscribed to systemd-hwe in Ubuntu.
https://bugs.launchpad.net/bugs/2124220

Title:
  [SRU] Prefer Wayland on OEM AMD+NVIDIA platforms

Status in OEM Priority Project:
  New
Status in gdm3 package in Ubuntu:
  Fix Released
Status in systemd-hwe package in Ubuntu:
  Invalid
Status in gdm3 source package in Noble:
  Fix Committed
Status in systemd-hwe source package in Noble:
  In Progress
Status in gdm3 source package in Plucky:
  Fix Released
Status in systemd-hwe source package in Plucky:
  Invalid
Status in gdm3 source package in Questing:
  Fix Released
Status in systemd-hwe source package in Questing:
  Invalid

Bug description:
  [ Impact ]

   * On some platforms with AMD integrated and NVIDIA discrete GPUs, the NVIDIA
   dGPU is incorrectly selected as the primary device, leading to issues such as
   [1][2]. This also causes glxgears to run on the dGPU instead of the iGPU,
   blocking Energy Star certification. These problems are mitigated or resolved
   when using Wayland. The OEM team has adopted this solution to prefer Wayland
   on affected AMD+NVIDIA platforms and proposes this SRU to address the OEM gap.

   * The update introduces new hwdb entries and udev rules in systemd-hwe-hwdb
   to set a property for affected systems. gdm3 is updated to prefer Wayland
   when this property is present, allowing OEMs to target specific hardware
   for Wayland by default and avoid these bugs.

  [ Test Plan ]

   * On a listed AMD+NVIDIA system, install the update and reboot. Confirm
   Wayland is selected (`echo $XDG_SESSION_TYPE` returns wayland). Verify the
   AMD iGPU is selected as the renderer with command `glxinfo -B`.

   * On other systems, confirm that display server selection is
  unchanged.

  [ Where problems could occur ]

   * If the rules match too broadly, Wayland may be selected on unsupported
   hardware.

   * If the rules miss affected platforms, the bug will persist. Display server
   selection logic could regress on hybrid graphics systems.

  [ Other Info ]

   * [1] AMD platform built-in display is not selected as primary GPU in Xorg
   session: https://gitlab.freedesktop.org/xorg/lib/libpciaccess/-/issues/23

   * [2] “PRIME Profiles” option disappears
   in nvidia-settings on AMD + Nvidia platforms:
   https://github.com/canonical/ubuntu-drivers-common/issues/123

   * Only platforms listed in hwdb are affected; others remain unchanged. The
   mechanism is extensible for future OEM needs.

   * This SRU targets only noble, as OEM certification for these platforms
   begins with noble, and future releases already default to Wayland.

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