Public bug reported:
After booting into a GNOME Wayland session on Ubuntu, gnome-shell
continuously logs the following errors:
Failed to query buffer age, got error 3003
Failed to lock front buffer on /dev/dri/card2:
gbm_surface_lock_front_buffer failed
The session also experiences repeated XWayland disconnects:
Connection to xwayland lost
This occurs on a hybrid graphics system using:
Intel UHD Graphics 770 (i915) card2
NVIDIA RTX 3050 Mobile (nvidia) card1
PRIME profile: on-demand
The issue appears related to GNOME/Mutter Wayland compositing and
DRM/GBM buffer handling.
Hardware
Intel Corporation Alder Lake-S GT1 [UHD Graphics 770]
NVIDIA Corporation GA107M [GeForce RTX 3050 Mobile]
Environment
Session type: wayland
PRIME mode: on-demand
Relevant Logs
Failed to query buffer age, got error 3003
Failed to lock front buffer on /dev/dri/card2:
gbm_surface_lock_front_buffer failed
Connection to xwayland lost
Failed to open gpu '/dev/dri/card1':
DRM_CLIENT_CAP_UNIVERSAL_PLANES not supported
Additional Notes
The following obsolete Mutter experimental features were present:
['scale-monitor-framebuffer', 'xwayland-native-scaling']
GNOME logs:
Unknown experimental feature 'scale-monitor-framebuffer'
Unknown experimental feature 'xwayland-native-scaling'
The issue seems significantly worse under Wayland than Xorg.
Steps to Reproduce
Boot Ubuntu
Log into GNOME Wayland session
Use desktop normally
Observe repeated gnome-shell GBM/front-buffer errors in journal
Expected Result
GNOME Wayland compositor should render normally without repeated DRM/GBM
failures or XWayland disconnects.
Actual Result
Continuous compositor buffer lock failures and periodic XWayland
disconnects occur.
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
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue May 12 11:56:37 2026
InstallationDate: Installed on 2026-04-27 (15 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
SourcePackage: mutter
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: mutter (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2152252
Title:
GNOME Wayland repeatedly fails to lock front buffer on Intel iGPU and
XWayland disconnects on hybrid Intel + NVIDIA system.
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