Bug#1099743: Wayland shell stops repainting the screen until monitor layout (or input devices?) change

[Jeremy Bícha]

On Fri, Mar 7, 2025 at 7:03 AM Nicolas Dandrimont <olasd at debian.org> wrote:
> This morning, I've upgraded the gnome-related packages from the 48 beta series
> to the 48 RC series and rebooted my laptop.
>
> Since then, I've had a baffling issue where the screen would stop repainting,
> until I unplug *or* replug my dock (which reconnects an external monitor,
> keyboard and mouse). I'm assuming what puts gnome-shell back on track is the
> change to the monitor layout, but I haven't really isolated the behavior yet
> (and I've now downgraded packages back to the ~beta versions to be able to work
> ;-)).

I was experiencing similar behavior with 48 Beta. Notably, it is much
more easily triggered during the hour-long Night Light transition. I
see that you emailed early in the morning so maybe you were
experiencing that. I recommend disabling Night Light until this issue
is fixed.

I also agree with Simon that sometimes the screen freezing seems to be
triggered by high CPU load.

I would like to downgrade the severity of this bug since this bug is
preventing 48 RC from reaching Testing. I believe it is probably that
48 RC is at least a bit better than 48 Beta in other areas. That isn't
saying that this bug isn't important and even Release Critical, but
just that it may not be new with 48 RC and staying on 48 Beta isn't
necessarily better for people using Testing. Also, I believe we will
want to reassign this bug to mutter. (Technically marking the bug as
found in 48 Beta would be equivalent to downgrading so I think that's
what I would do instead.)

Thank you,
Jeremy Bícha