Bug#1116619: kwin-wayland: all opened app crash when disconnecting usb-c docking station on a multi-monitor setup

[Patrick Franz <deltaone@debian.org>]

severity -1 important

Hi Claudio,

On Mon, 29 Sep 2025 09:48:25 +0200 Claudio F <klezkk@gmail.com> wrote:
> Package: kwin-wayland
> Version: 4:6.3.6-1
> Severity: grave
> Tags: a11y patch
> Justification: causes non-serious data loss
> X-Debbugs-Cc: klezkk@gmail.com
> 
> Dear Maintainer,
> 
>    * What led up to the situation? three-monitors setup: laptop + 2 
screens
> connected to a USB-C (non-thunderbolt) dock
>    * What exactly did you do (or not do) that was effective (or
>      ineffective)? disconnect the dock
>    * What was the outcome of this action? All displayed app crash.
>    * What outcome did you expect instead? Windows should get 
respositioned on
> the laptop screen.
> 
> Not sure at all, but itmaybe this bug is relevant "wayland: Check for 
> nullptr output in ColorManagementOutputV1" https://invent.kde.org/
> plasma/kwin/-/merge_requests/
> 8029file=f3e7c51f550d1f9eead066bfc3b1a6fabc24e938

Yes, the bug is known to us, but unfortunately it is not possible to 
backport that patch to Plasma 6.3. At least I haven't found a way as 
kwin fails to build with it.


-- 
Med vänliga hälsningar

Patrick Franz