Public bug reported:
GNOME became unusable after a system update. The Mutter experimental feature
'scale-monitor-framebuffer' was enabled in dconf (may have been set prior to
the update). WaylandEnable=false before and after the update and workaround.
System:
- Ubuntu 24.04
- AMD Radeon RX 6600
- 3840x2160 display, 100% scaling
- GNOME on Xorg
Issue:
After a recent update (including mutter/gnome-shell), the desktop showed severe
rendering problems:
- cursor offset / duplication
- windows difficult or impossible to interact with
- parts of the screen inaccessible
The system had been working normally prior to the update. No display
settings were intentionally changed.
Investigation showed:
experimental-features=['scale-monitor-framebuffer']
Workaround:
gsettings set org.gnome.mutter experimental-features "[]"
Disabling the feature immediately restored normal behavior.
It is unclear whether this is a regression or an incompatibility with
existing configuration, but the system becomes effectively unusable
without clear indication of the cause.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: mutter (not installed)
ProcVersionSignature: Ubuntu 6.17.0-20.20~24.04.1-generic 6.17.13
Uname: Linux 6.17.0-20-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 10 22:48:50 2026
InstallationDate: Installed on 2024-12-28 (469 days ago)
InstallationMedia: Ubuntu 24.04.1 LTS "Noble Numbat" - Release amd64
(20240827.1)
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 noble
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https://bugs.launchpad.net/bugs/2148058
Title:
Gmome GUI unusable/magnified
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