Created attachment 155421 [details] Monitor is identified correctly and enabled in this screenshot. SUMMARY *** NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols. See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports *** STEPS TO REPRODUCE 1. Connect monitor to computer 2. Power on system 3. SDDM or LightDM greeter 4. Select Plasma 5. Login OBSERVED RESULT At login monitor displays greeter. Plasma starts, screen goes blank and stays blank EXPECTED RESULT At login monitor displays greeter. Plasma starts, screen turns on and stays on. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: 6.1.6-arch1-3 (64-bit) (available in About System) KDE Plasma Version: 5.26.5 KDE Frameworks Version: 5.102.0 Qt Version: 5.15.8 ADDITIONAL INFORMATION When logging into Plasma on X11 it will be enabled and display the desktop. When enabled on kwin wayland, the monitor goes blank and stays blank at login. I have to restart the machine once logged into wayland in order to get the monitor to display anything again.
To be clear, it's just that one monitor that stays black, and not all of them, right?
(In reply to Nate Graham from comment #1) > To be clear, it's just that one monitor that stays black, and not all of > them, right? Correct. The other two monitors are displaying mouse cursor, desktop, everything. The monitor is detected but will not display anything.
Cool, thanks. Any chance you could test with the Plasma 5.27 beta? We fixed a ton of multimonitor issues for 5.27, and this might be one of them. See https://community.kde.org/Plasma/Live_Images#Arch_with_kde-unstable_repository
Unfortunately, I seem to only be able to install plasma 5.26.90. Except for the plasma-meta package which is on 5.27-1 which is okay. I can wait for Arch to update their repos. I will respond back when I am able to update all packages to 5.27?
5.26.90 is fine; that's current git master, AKA what will become 5.27. 5.26.80 is the beta version, if that's available.
There has been no change in behavior of the display.
OK, thanks.
Created attachment 155725 [details] This is a picture of my monitor active yet still blank using kwin wayland Here is a photo of my monitor detected, but still blank. When I use Spectacle, I can screenshot just this screen.
If there is anythi(In reply to Nate Graham from comment #7) > OK, thanks. I really appreciate you taking the time to look into this, if there is anything I can provide to help further please don't hesitate to ask.
Okay, I finally was able to acquire another machine to test this with. On Plasma 6+ Wayland it works with an intel HD 630 igpu using HDMI out. It does NOT work with my RX 6950 XT via HDMI or my RX 5700 XT via HDMI.
Could you try setting the environment variable KWIN_DRM_PREFER_COLOR_DEPTH=24 for KWin, and see if it works then?
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(In reply to Zamundaaa from comment #11) > Could you try setting the environment variable > KWIN_DRM_PREFER_COLOR_DEPTH=24 for KWin, and see if it works then? This solution worked. I appreciate that.
created an environment variable in ~/.config/plasma-workspace/env/ with the command: export KWIN_DRM_PREFER_COLOR_DEPTH=24
Okay, if reducing the bpc works, then this is a driver bug (it's supposed to do that automatically). Please report this to https://gitlab.freedesktop.org/drm/amd/-/issues