https://bugs.kde.org/show_bug.cgi?id=485805
Bug ID: 485805
Summary: Wayland session black screen no cursor, X11 black
screen with cursor until reboot after plugging into
external monitor
Classification: Plasma
Product: kwin
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: nathan.w.pul...@gmail.com
Target Milestone: ---
SUMMARY
related discussion post:
https://discuss.kde.org/t/wayland-boots-to-black-screen-no-cursor-x11-boots-to-black-screen-with-cursor/14274/2
The strange behavior began when I plugged in my laptop to an external monitor -
specifically a projector that used a VGA to hdmi adapter. The main monitor went
black but the secondary was still usable luckily.
Since then, the main laptop display has not shown an image except the login
screen when trying to log into wayland. I can log in from SDDM, but if I choose
wayland I get no splash screen just black without a cursor and have to enter a
tty and run killall sddm to get back to the sddm login screen or I have to
reboot. If I try to log in to X11 session after this, I get a black screen with
a cursor. In the X11 session, I am able to move my mouse to the top left corner
and I am able to see the view where it shows all your desktops at the top and
you can search for applications just below that. I usually have to reboot at
least once and log into x11 to get a full desktop environment again.
Additionally, when the screen locks in X11 session I am unable to see the
lockscreen until I switch to a different tty and then back again.
STEPS TO REPRODUCE
1. Plug in external monitor
OBSERVED RESULT
Main laptop screen is black and will not come back on during wayland session.
Unable to login to wayland session after this, X11 session also misbehaves.
Reboot does not fix.
EXPECTED RESULT
Screen mirror or extended. Main laptop screen works still.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma:
Platform: Garuda Linux
Kernel: Zen 6.8.7
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.1.0
Qt Version: 6.7.0
ADDITIONAL INFORMATION
I have tried reinstalling wayland, mesa and kwin_wayland which did not help. I
am not completely sure if this is a KDE bug or somewhere else. I h
kwin_wayland journalctl: https://pastebin.com/bey65eS0
sddm journalctl: https://pastebin.com/8kJD5VWE
wayland info: https://pastebin.com/f5Sd2j9q
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