Killall is a little overkill and there is a much simpler solution without killing processes.
But first I want to confirm that the issue is present on both Wayland and X11. Its also independent of Desktop Environment (KDE, XFCE, etc).
To troubleshoot and confirm it really is what we say it is and get the window ID:
Code:
xwininfo -root -tree 2>/dev/null | grep 'prlcc\|prl\|10x10'
This will show something like:
Code:
0x3a00001 "prlcc": ("prlcc" "Prlcc") 10x10+10+10 +10+10
It will likely show several other things, including the grep process itself and it might show a false positive hit with '10x10'. Ensure you look at the correct 'prlcc' line.
Also your hex code might differ. It shows there is a 'prlcc' window with a size of 10x10, but the invisible overlay is often bigger.
Code:
xwininfo -id 0x3a00001 -tree
Will show the process' child windows. Remember to use your own hex code. We don't actually use this info it just shows some extra info on child windows.
To show the actual processes of the window
Code:
xdotool getwindowpid 0x3a00001 && ps aux | grep prlcc
The remove the window. Again, use your own hex code.
Code:
xdotool windowkill 0x3a00001
I think a better work around is to actually move the window out of the desktop area.
Code:
xdotool windowmove 0x3a00001 -1000 -1000
Again, use your own hex code. The -1000 -1000 are X and Y coordinates. If you run dual screen setup depending on which monitor is primary, these coordinates might actually just move it to the other screen and still block a part of your desktop. If that happens, just increase to -10000 -10000. I'm not sure but I don't think there is a downside to using large numbers. I wouldnt go overboard though into millions. Just ensure its just out of usable desktop space. To be clear, its simply the combined resolution of your monitors. Two 1920 wide monitors will amount to 3840, so to place it offscreen double that or add another 1920 to it. Imagine you have 3 screens
.
Last but not least, I wholeheartedly agree this is very annoying and should be fixed. I don't think its very hard, just ensure its positioned off-screen.
Thanks.