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Summary:
When using Ubuntu 24.04 LTS (GNOME on Wayland) with a secondary monitor
connected, the laptop's internal display briefly "glitches" (short jump)
sometimes when a window is opened or moved on the external screen.
The issue occurs regardless of kernel version (tested with 6.8 and 6.14).
Display setup:
- Internal laptop screen (eDP-1): 1920x1080 @ 60 Hz
- External monitor (HDMI-1 / DP-1): 1920x1200 @ 60 Hz
- Fractional scaling: Disabled (100% on both screens)
Expected behavior
- Both displays should remain stable, with no visual disturbance on either
screen.
Actual behavior
- The laptop's internal display briefly "jumps" or "glitches" when a window is
opened or moved; the issue occurs occasionally but can repeat after some time.
- It does not occur under an Xorg session.
- The issue persists across reboots and with different monitors.
Additional notes:
- The system uses hybrid graphics (Intel + NVIDIA RTX 2000).
- NVIDIA Prime is set to "on-demand", so the integrated GPU handles display
rendering by default.
- $ glxinfo | grep "OpenGL renderer"
OpenGL renderer string: Mesa Intel(R) Arc(tm) Graphics (MTL)
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: mutter (not installed)
ProcVersionSignature: Ubuntu 6.14.0-34.34~24.04.1-generic 6.14.11
Uname: Linux 6.14.0-34-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu Oct 30 12:10:35 2025
InstallationDate: Installed on 2025-01-03 (300 days ago)
InstallationMedia: Ubuntu 24.04.1 LTS "Noble Numbat" - Release amd64
(20240827.1)
ProcEnviron:
LANG=fr_FR.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 glitch noble wayland-session
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Glitch on laptop screen when using dual display under Wayland
https://bugs.launchpad.net/bugs/2130319
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