https://bugs.kde.org/show_bug.cgi?id=479126
Bug ID: 479126 Summary: Wayland: High CPU on mouse move Classification: Plasma Product: kwin Version: 5.91.0 Platform: Arch Linux OS: Linux Status: REPORTED Severity: major Priority: NOR Component: compositing Assignee: kwin-bugs-n...@kde.org Reporter: john.etted...@gmail.com Target Milestone: --- SUMMARY Hello, Just moved to Plasma 6 Wayland from Plasma 5.27.10 Wayland and as is the session is unusable. I'm having 2 major issues: - If I don't do anything it seems fine but if I move the mouse kwin_wayland uses a crazy amount of CPU, well on this very weak CPU maybe on a powerful one it wouldn't be noticeable, but on mine the desktop can freeze if I move it much. By crazy amount I mean I can see a kwin_wayland process taking up to 190% in HTOP and I believe there's more than one process, whereas in the same situation without touching the mouse it's more like 2%. Using the input from kde connect causes the same behavior, but using my keyboard doesn't seem to have any bad effect. - With HDR on the screen keeps flickering. It could be some power/bandwidth issue related to the above, I never had that problem with gamescope/mpv. This machine has a first gen SSD, 8GB of RAM, a sandy bridge pentium and a Radeon 580 8Gb on Arch. The mouse is a Logitech G900 if it matters. It seems dropping the polling rate in piper for my mouse and disabling screen tearing in KCM drastically reduces the issue. Now kwin_wayland uses around 30% on mouse moves, interestingly systemsettings uses about the same (that's the main window currently) on mouse moves. STEPS TO REPRODUCE 1. start HTOP 2. move the mouse OBSERVED RESULT CPU used is super high. EXPECTED RESULT CPU used barely changes. SOFTWARE/OS VERSIONS Linux: 6.6.8 KDE Plasma Version: 5.91 KDE Frameworks Version: I'm not on that machine right now but through SSH I see this frameworkintegration 5.247.0 and plasma-framework5 5.113.0 (that one shouldn't matter I'm thinking) Qt Version: 6.7.0beta1 ADDITIONAL INFORMATION I only upgraded my system to latest, maybe I need to install some kind of meta package for 6 that would help? -- You are receiving this mail because: You are watching all bug changes.