So today I was playing with the Appearance settings - and then noticed that my screen started to have issues everywhere. For example, some windows have garbled content.
At the same time, I noticed many errors in dmesg, such as
panfront 1800000.gpu: gpu sched timeout, js=0, config=0x3700, status=0x50, head=... panfrost 1800000.gpu: js fault, js=0, status=INSTR_INVALID_PC, head=....
Since I was playing with a bunch of settings, I was a little bit afraid that I broke the hardware somehow - as the screen looks similar to my old broken GPU - but that sounds unlikely to me. Eventually I remembered that I changed the sub-pixel order to RGB. After changing it back to None, the issue was gone.
This seems like a bug somewhere - maybe in the driver. If you are brave enough, you can try to set that to RGB, and see if you get the same issue.
ps. I’m using the A04 model.