5.24.2 may give me black screen on laptop when external monitor is plugged.
The first bad commit is 29bc1173c70b2a31753c791aa60fb33ee320440a
backends/drm: ignore enabled state of outputs for the lifetime of surfaces
STEPS TO REPRODUCE
1. plugin second monitor
2. log in into kwin
laptop screen is still showing tty or blank (but not operatable). adjust systemsetting doesn't help to restore it into a usable state. Downgrade to 5.24.1 works.
screen show content correctly.
Linux/KDE Plasma: 5.24.2 Archlinux
KDE Frameworks Version: 5.91.0
Qt Version: 5.15.2
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/2067
I'm relatively certain that the MR should fix it but could you test it to make sure? I don't have a multi-gpu system
(In reply to Zamundaaa from comment #2)
> I'm relatively certain that the MR should fix it but could you test it to
> make sure? I don't have a multi-gpu system
I manually cherry-pick against Plasma/5.24 and it seems to fix my issue, thanks!
Git commit 85558234e1d86dc084cd2776cdb22799eaa9254b by Xaver Hugl.
Committed on 24/02/2022 at 21:48.
Pushed by zamundaaa into branch 'Plasma/5.24'.
backends/drm: fix multi gpu
In 5.24 there's still multiple egl backends, only outputs of the relevant
gpu may be handled
M +2 -2 src/backends/drm/egl_gbm_backend.cpp
*** Bug 450871 has been marked as a duplicate of this bug. ***
The update has just landed in Fedora 35. I can confirm that the issue is fixed. Thanks!