Why do all Qt apps simultaneously stop following focus?
-
I've been looking into this for a while and never managed to figure it out: I'm using Ubuntu 20.04 (MATE) and sometimes without apparent reason, all Qt apps stop following focus. By this I mean that buttons stop highlighting when mouse gets over them, tooltips do not show up anymore, etc. I'd be super grateful if someone could tell me what causes this, and and how to fix it!
This is only connected to Qt applications. No gtk app for instance seem to have this problem. And when it happens, all Qt apps (even when restarting them) have this problem.