** Bug watch added: gitlab.gnome.org/GNOME/gdm/-/issues #973
   https://gitlab.gnome.org/GNOME/gdm/-/issues/973

** Also affects: gdm via
   https://gitlab.gnome.org/GNOME/gdm/-/issues/973
   Importance: Unknown
       Status: Unknown

** Changed in: gdm3 (Ubuntu)
       Status: New => Fix Committed

** Changed in: gdm3 (Ubuntu)
    Milestone: None => ubuntu-25.10

** Tags added: fixed-in-gdm-49.rc fixed-upstream

** Also affects: gdm3 (Ubuntu Noble)
   Importance: Undecided
       Status: New

** Also affects: gdm3 (Ubuntu Jammy)
   Importance: Undecided
       Status: New

** Also affects: gdm3 (Ubuntu Plucky)
   Importance: Undecided
       Status: New

** Also affects: gdm3 (Ubuntu Questing)
   Importance: Undecided
     Assignee: Zhaoxuan Zhai (kxuan)
       Status: Fix Committed

** Changed in: gdm3 (Ubuntu Jammy)
     Assignee: (unassigned) => Zhaoxuan Zhai (kxuan)

** Changed in: gdm3 (Ubuntu Noble)
     Assignee: (unassigned) => Zhaoxuan Zhai (kxuan)

** Changed in: gdm3 (Ubuntu Plucky)
     Assignee: (unassigned) => Zhaoxuan Zhai (kxuan)

** Changed in: gdm3 (Ubuntu Plucky)
    Milestone: None => plucky-updates

** Changed in: gdm3 (Ubuntu Noble)
    Milestone: None => noble-updates

** Changed in: gdm3 (Ubuntu Jammy)
    Milestone: None => jammy-updates

** Changed in: gdm3 (Ubuntu Plucky)
       Status: New => In Progress

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

** Changed in: gdm3 (Ubuntu Jammy)
       Status: New => In Progress

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gdm3 in Ubuntu.
https://bugs.launchpad.net/bugs/2120413

Title:
  [SRU]Fix preferred display server has not been retried on start

Status in gdm:
  Unknown
Status in gdm3 package in Ubuntu:
  Fix Committed
Status in gdm3 source package in Jammy:
  In Progress
Status in gdm3 source package in Noble:
  In Progress
Status in gdm3 source package in Plucky:
  In Progress
Status in gdm3 source package in Questing:
  Fix Committed

Bug description:
  [ Impact ]

   * On Wayland only devices, when the Wayland display server fails to
     start occasionally, the gdm3 will only retry the unsupported Xorg
     display server instead of Wayland display server.
     The retry mechanism ineffective on these Wayland only devices,
     which in turn causes these devices to be unable to start graphics
     due to an occasional failure.

   * This patch backport from upstream and it will give 5 tries for
     the preferred display server (Wayland on our case).

  [ Test Plan ]

   This patch can be verified on ubuntu Desktop by following these steps:
   * Download attached gdm-crash-test.sh and save it into
     /usr/local/bin/gdm-crash-test.sh
     (This script will emulate a start fail of gdm)
   * Run "chmod +x /usr/local/bin/gdm-crash-test.sh"
   * Edit /usr/share/applications/org.gnome.Shell.desktop.
     Replace the line starts with "Exec=" to:

       Exec=/usr/local/bin/gdm-crash-test.sh
   * Reboot
   * - If this device does not support Xorg display server, you will
       unable to see the Ubuntu login screen.
     - If this device supports Xorg display server, in the Ubuntu login
       screen, you will noticed that Wayland option is unusable.
   * Then, install the test package on system and reboot.
   * With new package, the login screen will show normally, and the wayland
     option is usable.
   
  [ Where problems could occur ]

   * This patch adds 4 extra launch chances for the preferred display server.
     This may increase the delay in gdm selecting a fallback display server
     if the preferred display server is truly completely unavailable.

  [ Other Info ]

   * This patch has just been merged into gdm main branch, and it will be in
     the next gdm release.

   * This bug originally raised by our customer Adventech (LP: #2099664)

   * Upstream Issue: https://gitlab.gnome.org/GNOME/gdm/-/issues/973

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