https://bugs.kde.org/show_bug.cgi?id=400534
--- Comment #8 from pemartins <paulo76.alga...@hotmail.com> --- Thank you very much once again Christoph for your help. So now that with your instructions I was able to generate a backtrace report, KWin never crashed again... It always has hiccups when flash comes out of fullscreen but the crashes stopped, only a couple of seconds freezes occur every time. I changed some things yesterday, in example I changed the cursor theme among other things, so probably something I changed had some collateral effect. Also after my last post I realized that mpv media player also always crashed KWin if I put it on fullscreen, but also it is not happening anymore. Only 'hiccups' just like in flash. Here is a gdb report in which I ran mpv and flash in firefox: https://pastebin.com/raw/P1jZNMRa -- You are receiving this mail because: You are watching all bug changes.