https://bugs.kde.org/show_bug.cgi?id=485429
Bug ID: 485429 Summary: kwin to use %100 CPU on Wayland when nouveau.noaccel=1 Classification: Plasma Product: kwin Version: 6.0.3 Platform: Arch Linux OS: Linux Status: REPORTED Severity: normal Priority: NOR Component: general Assignee: kwin-bugs-n...@kde.org Reporter: erdem...@gmail.com Target Milestone: --- Created attachment 168416 --> https://bugs.kde.org/attachment.cgi?id=168416&action=edit no nouveau and intel xf86-video drivers installed SUMMARY kwin is using all CPU resources on Wayland session while using nouveau.noaccel=1 STEPS TO REPRODUCE 1. add nouveau.noaccel=1 to your kernel parameters, regenerate 2. reboot and login with a wayland session OBSERVED RESULT it's even hard to move your cursor, CPU usage is %100 EXPECTED RESULT acceptable average kwin CPU usage SOFTWARE/OS VERSIONS System: Host: arch Kernel: 6.8.4-zen1-1-zen arch: x86_64 bits: 64 Desktop: KDE Plasma v: 6.0.3 Distro: Arch Linux Graphics: Device-1: NVIDIA GT216M [GeForce GT 320M] driver: nouveau v: kernel Device-2: Bison HP Webcam driver: uvcvideo type: USB Display: server: X.Org v: 21.1.12 with: Xwayland v: 23.2.6 driver: X: loaded: modesetting unloaded: fbdev,vesa gpu: nouveau s-res: 1366x768 resolution: 1366x768 API: EGL v: 1.5 drivers: kms_swrast,swrast platforms: gbm,x11,surfaceless,device API: OpenGL v: 4.5 vendor: mesa v: 24.0.5-arch1.1 renderer: llvmpipe (LLVM 17.0.6 128 bits) API: Vulkan Message: No Vulkan data available. KDE Plasma Version: 6.0.3 KDE Frameworks Version: 6.0.0 Qt Version: 6.7.0 ADDITIONAL INFORMATION Using nouveau.noaccel=1 because i am having random kernel lockups: https://fedoraproject.org/wiki/Common_kernel_problems#Systems_with_nVidia_adapters_using_the_nouveau_driver_lock_up_randomly Using modesetting driver because of "purple note" sections with explanation links: https://wiki.archlinux.org/title/Nouveau But i also installed both xf86-video-nouveau and intel packages to see if anything changes, no difference at all about CPU usage. I am attaching journalctl logs and screenshot of CPU usage. -- You are receiving this mail because: You are watching all bug changes.