https://bugs.kde.org/show_bug.cgi?id=356711
--- Comment #2 from Danni H <dannihf...@fastmail.fm> --- Hi, a few points of clarification (forgive me if this isn't new information): The cause of the bug is most likely XEmbedSNIProxy, not KWin. Also, more specifically, the issue isn't "slowdown" but microstutter. If I have compositing running then it's impossible for me to get a smooth 60 FPS without microstutter (usually at least a couple dropped frames a second), likely because the contents have to go through both nVidia's VSync and KWin's VSync, which are not perfectly synchronized with each other. If I want a smooth display, I have to run games full-screen and unredirected. My hope is that in the future, Wayland, new nVidia drivers and/or a new version of KWin will finally solve microstutter in windowed applications. However, I do not know where I would file such a bug because I do not know where the fault lies in the current graphics stack. For now I would at least like to be able to run applications full-screen without microstutter. I need unredirection for that. To answer your questions: - Dropbox is the only X icon in the tray. - The icon was not repainting to my knowledge. It was not animating, and KWin's Show Paint effect did not reveal any painting related to this icon. - Disabling compositing resolves microstutter but I don't want to Alt + Shift + F12 or make a KWin rule for every game I play. My understanding is that SDL2 only does unredirected fullscreen when there are no windows on top. Is there some sort of stray X window that XembedSNIProxy has that is sticking to the top, or is somehow trying to paint itself above everything else? This is my best guess as to what's going on. My current workaround is to prevent xembedsniproxy from running at login. -- You are receiving this mail because: You are watching all bug changes.
