https://bugs.kde.org/show_bug.cgi?id=422415
--- Comment #7 from Konstantin <io...@abv.bg> --- Here are more findings - I definitely could see the problem when I execute update-grub. I see this only when video is playing in background (firefox). If I use Xrander there are no issues. If I disable the vsync no issues for all. So to sum up to reproduce: 1. Start firefox and start video on youtube. 2. Execute update-grub Result: The whole screen is flashing with white lines. -- You are receiving this mail because: You are watching all bug changes.
