@haeckerfelix my head exploded when reading your toot. Because the same thing happen to me. Not an ikea chair, and only happened since I got my new ultrawide screen months ago. I was like "This should be a problem with a cable" but couldn't find anything... and stopped looking for a reason... "ok, nevermind"

I didn't even think someone else could have the problem :D

Thanks for the explanation, and the "it blew my mind" moment I had while reading your first message, like "WHAAAAAAT" :D