https://bugs.kde.org/show_bug.cgi?id=527212
Bug ID: 527212
Summary: An already known issue where while you se
KWIN_DRM_DEVICES="/dev/dri/by-path/pci-0000\:03\:00.0-
card:/dev/dri/by-path/pci-0000\:06\:00.0-card" on a
muxless device like the MSI delta 15, you also use an
external monitor, the laptop screen is entirely black
Classification: Plasma
Product: kwin
Version First 6.8.0
Reported In:
Platform: CachyOS
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: compositing
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
DESCRIPTION
while you se
KWIN_DRM_DEVICES="/dev/dri/by-path/pci-0000\:03\:00.0-card:/dev/dri/by-path/pci-0000\:06\:00.0-card"
on a muxless device like the MSI delta 15, the laptop screen is black after
you log in into the plasma session, SDDM both screens work fine, this issue
also happened to me in KDE 6.7 or so, We figured it out that RADV_DEBUG=nodcc
is a workaround, and like in that time, this also workarounds the issue.
STEPS TO REPRODUCE
1. Create a mkdir -p ~/.config/environment.d
2. in that env config file put:
KWIN_DRM_DEVICES="/dev/dri/by-path/pci-0000\:03\:00.0-card:/dev/dri/by-path/pci-0000\:06\:00.0-card"
3. Reboot the laptop/device
OBSERVED RESULT
The laptop screen and the external monitor works fine on SDDM, but when you log
in in to plasma, laptops screen becomes black
EXPECTED RESULT
should work both screens
SOFTWARE/OS VERSIONS
Operating System (available in the Info Center app, or by running `kinfo` in a
terminal window):
KDE Plasma Version: 6.8
KDE Frameworks Version:
Qt Version:
ADDITIONAL INFORMATION
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