SUMMARY STEPS TO REPRODUCE Need a Displaylink 2 device, (one that uses the UDL device start kwin_wayland on the displaylink device. I usually move the main integrated card0 into another seat, so that the DisplayLink card is the only dri device in seat0 start a simple application that doesn't change often, like xterm, or konsole. Press a key, or move the mouse. Observe the screen switch off, then back on OBSERVED RESULT Nothing interesting appears in the stdio/stderr log. I'm not sure the correct QT_LOGGING* variables to export... EXPECTED RESULT Weston runs on UDL, (the GL render works with a mesa patch workaround), but it runs with the --use-pixman flag, so I'd expect it to run like Weston. It needs a newer kernel (from past some 5.something version that I forget.) Nothing worked at ALL before on UDL SOFTWARE/OS VERSIONS Linux/KDE Plasma: Linux 5.3.0 (Debian Buster (with the kernel from Debian Bullseye) KDE Plasma Version: Master KDE Frameworks Version: Master Qt Version: 5.14 ADDITIONAL INFORMATION
I am willing to test with adding debug lines in places, trying workarounds, etc. It happens every time a frame changes. I can open say, Konsole, and the screen will flash every time I move the cursor, or every time I type a letter into Konsole
Eh, now I can't seem to replicate it...