| Summary: | kwin_wayland high cpu usage when docked | ||
|---|---|---|---|
| Product: | [Plasma] kwin | Reporter: | meierluis |
| Component: | wayland-generic | Assignee: | KWin default assignee <kwin-bugs-null> |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | normal | CC: | nate, xaver.hugl |
| Priority: | NOR | ||
| Version: | 5.27.2 | ||
| Target Milestone: | --- | ||
| Platform: | Fedora RPMs | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed In: | ||
| Attachments: | Archived perf data | ||
*** This bug has been marked as a duplicate of bug 452219 *** |
Created attachment 157261 [details] Archived perf data I am running Plasma 5.27.2 on a Fedora machine with hybrid intel/nvidia graphics. Sytem: Lenovo P1 with a RTX A2000 When docking the laptop via USB-C or Thunderbolt to one or multiple external monitors kwin_wayland is constantly above 50% CPU usage. As soon as i move the mouse or do a user input kwin_wayland occupies one CPU with nearly 100% usage and the system gets extremely laggy. STEPS TO REPRODUCE 1. Attach laptop to dock via USB-C or Thunderbolt 2. Move mouse, window or keyboard inpt OBSERVED RESULT 100% CPU usage on kwin_wayland, laggy Plasma EXPECTED RESULT Non laggy Plasma SOFTWARE/OS VERSIONS Linux/KDE Plasma: Fedora Linux 37 (KDE Spin) (available in About System) KDE Plasma Version: 5.27.2 KDE Frameworks Version: 5.103.0 Qt Version: 5.15.8 Kernel Version: 6.1.15-200.fc37.x86_64 I have run: sudo perf record --call-graph dwarf -p `pidof kwin_wayland` as suggested in another post. Seems like "__memmove_avx_unaligned_erms" seems to be the part where the high load is generated. I have attached the archived perf.data file, which was created with 'perf archive'.