Public bug reported:
Summary:
Wayland session drops to GDM. GNOME Shell ([email protected]) is
killed with status=9/KILL at the same time the kernel logs an AMDGPU DRM
display timeout. All Wayland clients lose the compositor connection.
Details:
- Ubuntu 24.04 LTS (GNOME Shell 46, Wayland)
- Multi-monitor AMD GPU system
- Not an OOM event (no OOM killer messages)
- No gnome-shell coredump; shell is SIGKILL’d by systemd
- Kernel logs show:
amdgpu [drm] REG_WAIT timeout (program_formatter_reset_dig_resync_fifo)
at the same timestamp the session terminates.
Observed behavior:
The entire GNOME Wayland session exits back to GDM. All applications report
“Lost connection to Wayland compositor / Broken pipe”.
Possible trigger:
This appears to happen more than once while dragging a Chrome tab out of a
browser window to create a new window (often when maximized or tiled across
large/multiple monitors). This may be a stress trigger rather than the root
cause.
Request:
Please advise whether this should be handled as a Mutter / gnome-shell Wayland
issue or forwarded to AMDGPU (kernel / Mesa). I can test without extensions or
provide additional logs if needed.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: gnome-shell 46.0-0ubuntu6~24.04.13
ProcVersionSignature: Ubuntu 6.17.0-14.14~24.04.1-generic 6.17.9
Uname: Linux 6.17.0-14-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Feb 10 08:29:07 2026
DisplayManager: gdm3
InstallationDate: Installed on 2025-11-24 (78 days ago)
InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64
(20250805.1)
RelatedPackageVersions: mutter-common 46.2-1ubuntu0.24.04.14
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: gnome-shell (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble wayland-session
** Attachment added: "kernel logs journal window GNOME Shell kill grep
system info Chrome / Wayland indicators"
https://bugs.launchpad.net/bugs/2141396/+attachment/5944602/+files/wayland-crash-2026-02-10.zip
--
You received this bug notification because you are a member of Ubuntu
Desktop Bugs, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/2141396
Title:
Wayland session drops to GDM. GNOME Shell killed with status=9/KILL at
the same time kernel logs AMDGPU DRM display timeout. All Wayland
clients lose the compositor connection.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2141396/+subscriptions
--
desktop-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
