https://bugs.kde.org/show_bug.cgi?id=439267
Bug ID: 439267
Summary: Frequent freezes since switching to Wayland
Product: kwin
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: liubomi...@gmail.com
Target Milestone: ---
SUMMARY
I frequently/daily experience freezes where nothing responds and the clock
doesn't count seconds. These freezes are for about 3-4 seconds. Happens maybe 3
times a day. I was using Kubuntu 20.04 LTS before but clean reinstalled to
Kubuntu 21.04 and started to use Wayland from day 1.
The last two times the freezes occured were:
1. When i clicked to open the Application Launcher. Freezed for two seconds and
only then opened it. From then on it opens instantly
2. When i opened a new tab in Dolphin and then switched to it and tried to open
one folder. Whole UI freezed for maybe 5 seconds and only then opened the
folder.
When i pressed Win + D to switch to Desktop i think it worked but i'm not sure
whether it was while it was freezed or after that. I have a CPU and memory
widgets on the desktop and immediately after i switched to desktop they were
showing 75% RAM and 46 % CPU.
I use linux-lowlatency and the bfq io scheduler, also zram and btrfs. Before i
was on 20.04 with linux-lowlatency and the bfq io scheduler and zram + ext4.
That makes me feel it's either a Wayland/KWin issue or a btrfs one. But i doubt
btrfs can have such a big impact.
I am open to suggestions how to help you diagnose this.
STEPS TO REPRODUCE
Happens randomly, always after a click from me with the mouse.
OBSERVED RESULT
Freeze
EXPECTED RESULT
No freeze
SOFTWARE/OS VERSIONS
Operating System: Kubuntu 21.04
KDE Plasma Version: 5.22.0
KDE Frameworks Version: 5.82.0
Qt Version: 5.15.2
Kernel Version: 5.11.0-18-lowlatency (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i5-8250U CPU @ 1.60GHz
Memory: 7,6 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620
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