[Bug 2150776] Re: Ubuntu 26.04 GNOME Wayland: random short display/presentation freezes on AMD RX 7900 XT while apps continue running

Confirming the fix on my end as well since I originally reported this bug. I've been running 7.0.0-27-generic as my daily driver for at least the past two weeks (installed via the normal official update - sudo apt upgrade - once 7.0.0-27 reached the release pocket, so no -proposed needed anymore). In that time, doing the same things that used to reliably trigger the freezes - Counter-Strike 2 on one monitor with video (YouTube/Twitch) playing on the second monitor - I have not experienced a single display freeze, neither the short sub-second ones nor the long multi-minute ones. This matches the other reports above (#11-#14) that 7.0.0-26 / 7.0.0-27 resolves the issue. So from my side this looks fixed by the 7.0.0-26/-27 kernel. One caveat for anyone landing here: earlier in this bug I had concluded that the 6.19.10 mainline kernel was also a workaround, but I later hit the same freeze (including a total pipe wedge) on 6.19.10 too - it only reduced the frequency. 7.0.0-27 is the first kernel where I genuinely stopped seeing the freezes. Thanks to everyone who tested and to the maintainers. Happy for this to be marked fixed if that matches the maintainers' view. -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2150776 Title: Ubuntu 26.04 GNOME Wayland: random short display/presentation freezes on AMD RX 7900 XT while apps continue running Status in linux package in Ubuntu: Confirmed Bug description: After installing Ubuntu 26.04 LTS, the display randomly freezes for a short time, usually a few hundred milliseconds to around one second. This is most visible in games and video playback, but it can also happen outside games (e.g. watching a video or just using Ubuntu). During the freeze, the application/game continues running. For example, in Counter-Strike 2 or Albion Online, if I am moving when the freeze happens, after the screen updates again my character is farther ahead. This suggests the system/game/input are still running, but the display/presentation stops updating temporarily. Audio usually continues normally. Very rarely, during longer freezes, audio repeats/stutters briefly. This did not happen on the same hardware with Ubuntu 24.04.4, Ubuntu 25.04, or Ubuntu 25.10. It started only on Ubuntu 26.04. Hardware: - CPU: AMD Ryzen 7 7700X - GPU: AMD Radeon RX 7900 XT / Navi 31 - Motherboard: ASRock B650M Pro RS WiFi - RAM: 32 GB - Monitors: 2x Dell S2721HS, 1920x1080, 60/74.97 Hz Software: - Ubuntu 26.04 LTS - GNOME Shell 50.1 - Wayland session - Mutter/libmutter 50.1 - Kernel 7.0.0-15-generic - Mesa 26.0.3 - RADV/radeonsi - Xwayland 24.1.10 What I tried: - Disabled VRR: no change - Tested 60 Hz and 74.97 Hz: no useful change - Disabled second monitor: no change - Disabled all GNOME Shell extensions: no change - Created a clean new user account and tested there: still freezes - Disabled Ryzen iGPU so only RX 7900 XT remained visible: still freezes - Updated motherboard BIOS from 1.30 to 4.20: no change - Tried amdgpu.dcdebugmask=0x12, 0x20012, 0x20052: no change - Tried runtime power_dpm_force_performance_level=high: no change - Tried MUTTER_DEBUG_FORCE_KMS_MODE=simple, MUTTER_DEBUG_KMS_THREAD_TYPE=user, MUTTER_DEBUG_DISABLE_HW_CURSORS=1: no change - Tried disabling unredirect/direct scanout through GNOME Looking Glass: no change - Kernel logs do not show amdgpu ring timeout or GPU reset during freezes - dmesg did show repeated AMD display-manager workqueue warnings: "dm_handle_vmin_vmax_update [amdgpu] hogged CPU for >10000us" Expected: The display should continue presenting frames smoothly. Actual: The visible display freezes briefly, then jumps forward, while the application continues running underneath. ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: libmutter-18-0 50.1-0ubuntu2 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: Thu Apr 30 21:47:54 2026 InstallationDate: Installed on 2026-04-29 (1 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) SourcePackage: mutter UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2150776/+subscriptions