I have encountered this bug, apparently it has been here for a while. Not kde speciffic, not sure what it is but I can confirm that when the system goes to suspend and after i turn it back on the cursor movement is extremelly jittery and laggy. I ran a dmesg and a usb bus would say that it disconnected. Then i would look in the touchpad settings and the touchpad device would not be there. Maybe is the way it suspends? I found out that once that happens you have to invoke a " sudo systemctl suspend " then turn it back on and the problem would be solved immediately. Maybe whatever mechanism its being used to suspend can append a workarround for this? The laptop that has this issue is my Thinkpad T480, with my T470 I dont recall having this issue. STEPS TO REPRODUCE 1. wait for the system to suspend 2. turn it back on 3. touchpad /mouse cursor will have the issue (happens very often but i cant say it will be 100% all the time) OBSERVED RESULT If i invoke a " sudo systemctl suspend " and bring the computer back on, the issue is gone. If i dont the issue remains. Operating System: openSUSE Tumbleweed 20220225 KDE Plasma Version: 5.24.2 KDE Frameworks Version: 5.91.0 Qt Version: 5.15.2 Kernel Version: 5.16.10-1-default (64-bit) Graphics Platform: Wayland Processors: 8 × Intel® Core™ i5-8350U CPU @ 1.70GHz Memory: 31.2 GiB of RAM Graphics Processor: Mesa Intel® UHD Graphics 620
(In reply to Danny Medina from comment #0) > I have encountered this bug, apparently it has been here for a while. Not > kde speciffic, not sure what it is but I can confirm that when the system > goes to suspend and after i turn it back on the cursor movement is > extremelly jittery and laggy. I ran a dmesg and a usb bus would say that it > disconnected. Then i would look in the touchpad settings and the touchpad > device would not be there. > > Maybe is the way it suspends? > I found out that once that happens you have to invoke a " sudo systemctl > suspend " then turn it back on and the problem would be solved immediately. > > Maybe whatever mechanism its being used to suspend can append a workarround > for this? > > The laptop that has this issue is my Thinkpad T480, with my T470 I dont > recall having this issue. > > > STEPS TO REPRODUCE > 1. wait for the system to suspend > 2. turn it back on > 3. touchpad /mouse cursor will have the issue (happens very often but i cant > say it will be 100% all the time) > > OBSERVED RESULT > If i invoke a " sudo systemctl suspend " and bring the computer back on, the > issue is gone. > If i dont the issue remains. > > Operating System: openSUSE Tumbleweed 20220225 > KDE Plasma Version: 5.24.2 > KDE Frameworks Version: 5.91.0 > Qt Version: 5.15.2 > Kernel Version: 5.16.10-1-default (64-bit) > Graphics Platform: Wayland > Processors: 8 × Intel® Core™ i5-8350U CPU @ 1.70GHz > Memory: 31.2 GiB of RAM > Graphics Processor: Mesa Intel® UHD Graphics 620 It apperas the issue is the trackpoint?? I had to disable it in the BIOS so my mouse would work.. Havent noticed in on other DEs though..
This sounds like a Kernel issue or a Libinput issue. I would encourage you to reach out to the Libinput developer about it. https://gitlab.freedesktop.org/libinput/libinput/-/issues/