I can confirm this issue on a different hardware configuration — possibly useful as it shows the bug isn't limited to multi-monitor or NVIDIA-driving-the-display setups. System:
Ubuntu 26.04 LTS (Resolute Raccoon) GNOME Shell 50.1-0ubuntu1.1 / libmutter-18-0 & mutter-common 50.1-0ubuntu2.2 (latest available in resolute-updates) Kernel 7.0.0-27-generic Single internal panel (eDP-1) driven by Intel iGPU (Alder Lake-P, Iris Xe Graphics, i915), no external monitor connected Secondary discrete GPU present (NVIDIA RTX 3050 Laptop, driver 595.71.05-open, nvidia-driver-595-open), PRIME in on-demand mode, not driving any display Observed behaviour: Same error signature as reported here: Failed to query buffer age, got error 3003 Failed to lock front buffer on /dev/dri/card1: gbm_surface_lock_front_buffer failed (card1 = Intel iGPU in my case, the GPU actually driving the display) Triggers observed: The error burst reliably correlates with any new-window or focus-change event, reproduced with: Launching/restarting an IntelliJ IDEA instance (even after forcing -Dawt.toolkit.name=XToolkit to route it through XWayland instead of native Wayland) Opening a new GNOME terminal (Ptyxis) window via keyboard shortcut A PackageKit-triggered UI event during apt install An Electron app (Slack, running with --ozone-platform=wayland) receiving window focus All four triggers are otherwise unrelated apps/toolkits, which suggests the shared cause sits in Mutter's own surface-commit/focus-transition path rather than in any specific application's rendering backend. Mitigations tried: gsettings set org.gnome.mutter experimental-features "[]" — already empty by default in my case, did not prevent the issue No newer mutter/gnome-shell package available (apt-cache policy shows Candidate = Installed at 50.1-0ubuntu2.2 / 50.1-0ubuntu1.1) Happy to attach a ShellJournal excerpt if useful — let me know what format is preferred. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/2152207 Title: Failed to lock front buffer on /dev/dri/card1: gbm_surface_lock_front_buffer failed | Failed to query buffer age, got error 3003 To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/2152207/+subscriptions -- desktop-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
