Florian Reichmuth

>  > > For me it generally seems to work on wayland (KDE Plasma 6 in this case) but the position is off, which might be due to my...

This might be an easy fix but what about adding 'without X11 $DISPLAY' to warnings.filterwarnings('ignore', 'could not open display')? It works on my Raspberry PI.

OK I will try to help find the reason of the warning.

I found a potential reason. The Error only occurs when the system is using PulseAudio. A quick search in the Raspberry PI forums found me a workaround. ( http://www.raspberrypi.org/forums/viewtopic.php?t=31961&p=278613 )

Oh I forgot to mention... Yes it "kills" the warning.