Bug#1125275: mutter: Black screen on an HDMI monitor after loading Gnome Wayland session on a laptop with AMD Radeon graphics

[Simon McVittie]

On Fri, 23 Jan 2026 at 20:14:54 +0200, Nazarii Kretovych wrote:
>journalctl -b 
>shows lots of
>січ 23 19:48:01 thinkpad gnome-shell[2301]: Page flip failed:
>drmModeAtomicCommit: Invalid argument
>and
>січ 23 19:48:01 thinkpad gnome-shell[2301]: Cursor update failed:
>drmModeAtomicCommit: Invalid argument

That suggests that this is the same issue as #1125941, or at least 
closely related.

Please try the test-build of gnome-shell from 
<https://people.debian.org/~smcv/temp/2026/bug1125941/revert/> which 
reverts an upstream change that might have caused this. (Built from 
<https://salsa.debian.org/gnome-team/gnome-shell/-/merge_requests/114)

>The back screen happens when on both internal and external (hdmi) screens. Even
>if I disconnect my external monitor completely, the internal screen will still
>be black after logging into Wayland session.

Thanks, that's also useful information - that confirms that it isn't 
necessary to have a complicated monitor layout to see this issue.

     smcv