https://bugs.kde.org/show_bug.cgi?id=485425
--- Comment #10 from fililip <t...@nitrosubs.live> --- After further testing, this can also happen when any "custom-border"/"custom-window" Xwayland app (such as FL Studio via Wine, Steam, game/mod launchers via Wine, etc.) is launched. This in turn forces full refresh rate whole-screen on all screens (unless VRR requirements are met, see below). These full repaints are easy to visualize with the Show Paint desktop effect in KWin. I've also tried removing the nvidia driver again, this time to no avail - FL Studio manages to trigger this behavior even on a single GPU (AMD) setup, so thankfully it seems like it's not an NVIDIA bug after all. (The Steam window itself for some reason manages to work fine on just AMD, but everything falls apart if I launch a game with "custom" windows, like OMSI 2.) However, this is probably intended behavior anyway (the minimum refresh rate requirement for VRR is not enforced prior to launching these apps, see https://bugs.kde.org/show_bug.cgi?id=483240, starting one of them "makes it work"). I'll just stick to nested compositing, the Wine Wayland driver and gamescope wherever I can - I'd like to retain full kernel LFC if possible. The only real issue with these repaints is the relatively "high" CPU usage they cause (compared to when they aren't present). -- You are receiving this mail because: You are watching all bug changes.
