Thanks for the video! That "flash" seems to be the whole screen
flickering to black. It can happen if the Wayland backend fails to
assign a buffer to the screen for a frame. But it can also happen with
monitor connection issues that may be hardware or software (kernel)
problems. That's less likely on a laptop but not impossible (I've seen
it there too).
Let's assume it's a software bug in Mutter's Wayland backend, but I am
out of ideas right now other than using 'Ubuntu on Xorg' as a
workaround.
** Summary changed:
- Random flashes in gnome-shell
+ [Notebook N7x0WU] Random black flickers in gnome-shell
** Summary changed:
- [Notebook N7x0WU] Random black flickers in gnome-shell
+ [Notebook N7x0WU] Random black flickers in gnome-shell Wayland sessions
** Package changed: gnome-shell (Ubuntu) => mutter (Ubuntu)
** Changed in: mutter (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/1948778
Title:
[Notebook N7x0WU] Random black flickers in gnome-shell Wayland
sessions
Status in mutter package in Ubuntu:
Confirmed
Bug description:
Ubuntu 22.04 development branch up to date to latest @ 26/10/2021
kernel 5.13.0-19-generic
While working around on the desktop i'm getting short screen flashes like a
screenshot style
i cant reproduce them, they seem to come on random like every few minutes
journal logs dont record anything while they occur
this only happens on wayland, tested a long session on xorg where they
dont occur
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: gnome-shell 40.5-1ubuntu2
ProcVersionSignature: Ubuntu 5.13.0-19.19-generic 5.13.14
Uname: Linux 5.13.0-19-generic x86_64
ApportVersion: 2.20.11-0ubuntu70
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Tue Oct 26 11:12:30 2021
DisplayManager: gdm3
RelatedPackageVersions: mutter-common 40.5-1ubuntu2
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.xdg.autostart.gnome-shell-overrides-migration.desktop:
2021-10-23T19:12:47.175230
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