Eh, this again… Check Outstanding problems with LG monitor Thunderbolt stability / GPU hangs .
I’m not updating the thread anymore as I don’t want it to look even more spammy.
My last finding is that this is likely related to mesa, see my bug report. Sadly, from what I’ve noticed, radeonsi backend doesn’t get too much love these days.
I’m installing 26.0.0 now to check if it makes any difference.