Public bug reported:
Summary: Continuous gbm_surface_lock_front_buffer failed on AMD Cezanne APU
with dual monitor + Xwayland Electron app
Description:
On Ubuntu 26.04 LTS with GNOME 50.1 and Mutter 50.1-0ubuntu2, launching any
Electron-based application via Wine 11.0 under Xwayland while a second monitor
is connected causes continuous gbm_surface_lock_front_buffer failed errors on
/dev/dri/card1, resulting in visible rainbow pixel corruption at the monitor
boundary.
Hardware: Lenovo ThinkPad T14 Gen 2 AMD, Cezanne APU (Radeon Vega, PCI
1002:1638), single GPU driving internal eDP-1 (laptop display) + external
HDMI-A-1 simultaneously.
Trigger: Electron app running under Wine 11.0 via Xwayland with dual monitors
connected. Corruption stops immediately when second monitor is disconnected. No
corruption occurs with non-Electron Wine apps under the same conditions.
Errors from journalctl:
gnome-shell[5444]: Failed to lock front buffer on /dev/dri/card1:
gbm_surface_lock_front_buffer failed
gnome-shell[5444]: Failed to query buffer age, got error 3003
These fire hundreds of times per minute during the affected session.
Notes: PSR is disabled (psr_state: 0), Panel Replay is disabled,
amdgpu.dcdebugmask=0x10 is set. Mutter 50.1 GPU fixes are all Nvidia-specific
and do not address this AMD single-GPU dual-monitor Xwayland path.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: mutter (not installed)
ProcVersionSignature: Ubuntu 7.0.0-15.15-generic 7.0.0
Uname: Linux 7.0.0-15-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon May 11 14:07:24 2026
InstallationDate: Installed on 2026-04-14 (27 days ago)
InstallationMedia: Ubuntu 24.04.4 LTS "Noble Numbat" - Release amd64 (20260210)
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
SourcePackage: mutter
UpgradeStatus: Upgraded to resolute on 2026-04-27 (14 days ago)
** Affects: mutter (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2152207
Title:
electrong stutter mutter pixels amd no update
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