SUMMARY When I'm connecting a type-c "mini dock station" with an HDMI output, plasma does not persist on both screens (the second output is just black) even though the screen is fully functional. I can configure it and move windows there. It's an interesting effect that when the systemsettings are on the internal screen and I set the external output as primary, nothing happens — plasma remains on the internal screen. However, if I move the system settings to the second screen and apply the same setting, plasma jumps to the second screen, and the internal screen goes black (though still functional). I can reproduce this on two notebooks(AMD and Intel), and it seems to be a Wayland-only problem. I don't know what logs could be useful, let me know if you need anything additional. STEPS TO REPRODUCE 1. Connect seconds monitor through typec-to-hdmi converter 2. Configure as extended output 3. Try to achieve plasma on both screen OBSERVED RESULT Plasma can persist only on the one screen EXPECTED RESULT Plasma appears on both screens, with no black second screen SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 6.1.4 KDE Frameworks Version: 6.4.0 Qt Version: 6.7.2 Kernel Version: 6.10.4-zen2-1-zen (64-bit) Graphics Platform: Wayland Processors: 16 × AMD Ryzen 7 5700U with Radeon Graphics Memory: 13.5 GiB of RAM Graphics Processor: AMD Radeon Graphics Manufacturer: LENOVO Product Name: 82LN System Version: IdeaPad 5 15ALC05
I use a similar dock/dongle thingy with an HDMI monitor every day, and have never experienced this. On the external screen, you can move windows to it but the background is all black, right? You can't right-click on it to get a context menu? Is that correct? If that's the case, does the issue get resolved if you restart plasmashell with `plasmashell --replace` in a terminal window? If that works, then can you try creating a new panel on the external screen? After that, disconnect the screen or the USB-C dongle and then connect them again to trigger the issue once more. At this point in time, does the new panel you created become visible on the external screen, even though the background is all black?
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>> On the external screen, you can move windows to it but the background is all black, right? You can't right-click on it to get a context menu? Is that correct? Yes, you are absolutely right. >> If that's the case, does the issue get resolved if you restart plasmashell with `plasmashell --replace` in a terminal window? Will check this and other steps soon. It's not my permanent configuration, so I need to get to it.
Hm... I reinstalled my Qt6 packages, and it seems the problems have been resolved. It was probably due to some experiments I forgot to revert... Sorry for the false alarm :( The bug can be closed