https://bugs.kde.org/show_bug.cgi?id=481374
Marc <marc.ferl...@sonatest.com> changed:
What |Removed |Added
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CC| |marc.ferl...@sonatest.com
--- Comment #5 from Marc <marc.ferl...@sonatest.com> ---
I'm seeing something very similar here. I just booted the
neon-user-20240523-1335.iso ISO in QEMU (I'm running Ubuntu 22.04 as the host
system).
Simply moving the mouse around gives me these messages in the system journal
(journalctl | grep libinput):
May 23 18:55:55 neon kwin_wayland[1104]: kwin_libinput: Libinput: event2 -
VirtualPS/2 VMware VMMouse: client bug: event processing lagging behind by
29ms, your system is too slow
May 23 18:55:56 neon kwin_wayland[1104]: kwin_libinput: Libinput: event2 -
VirtualPS/2 VMware VMMouse: client bug: event processing lagging behind by
78ms, your system is too slow
May 23 18:56:01 neon kwin_wayland[1104]: kwin_libinput: Libinput: event2 -
VirtualPS/2 VMware VMMouse: client bug: event processing lagging behind by
28ms, your system is too slow
May 23 18:56:05 neon kwin_wayland[1104]: kwin_libinput: Libinput: event2 -
VirtualPS/2 VMware VMMouse: client bug: event processing lagging behind by
32ms, your system is too slow
May 23 18:56:38 neon kwin_wayland[1104]: kwin_libinput: Libinput: event2 -
VirtualPS/2 VMware VMMouse: client bug: event processing lagging behind by
32ms, your system is too slow
May 23 18:56:38 neon kwin_wayland[1104]: kwin_libinput: Libinput: event2 -
VirtualPS/2 VMware VMMouse: WARNING: log rate limit exceeded (5 msgs per
60min). Discarding future messages.
>From what I undertand, kwin_libinput isn't able to keep up (dispatch) events
fast enough and so libinput complains.
I also have this exact same behaviour on a custom image (yocto based) running
plasma mobile.
Another thing to try is `sudo evtest`, select the first mouse (VirtualPS/2
VMware Mouse) and look at the events. The faster the mouse moves the 'jerkier'
it gets. CPU usage for the kwin_wayland process also goes up substantially
(~12%).
Note: doesn't happen when running on mutter, with the same QEMU setup.
kinfo:
Operating System: KDE neon 6.0
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.2.0
Qt Version: 6.7.0
Kernel Version: 6.5.0-35-generic (64-bit)
Graphics Platform: Wayland
Processors: 2 × AMD Ryzen 9 7900 12-Core Processor
Memory: 7.7 GiB of RAM
Graphics Processor: virgl
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