Bug 450925

Summary:	Jittery cursor after suspend/hibernate
Product:	[Unmaintained] Powerdevil	Reporter:	Danny Medina <lyrixcaz>
Component:	general	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED UPSTREAM
Severity:	normal	CC:	nate
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	unspecified
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Danny Medina 2022-02-27 14:28:28 UTC

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

Comment 1 Danny Medina 2022-03-13 15:24:16 UTC

(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..

Comment 2 Nate Graham 2022-03-25 15:09:55 UTC

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/