Bug 427700 - Bluetooth mouse lags after couple of seconds inactivity
Summary: Bluetooth mouse lags after couple of seconds inactivity
Status: RESOLVED NOT A BUG
Alias: None
Product: plasmashell
Classification: Plasma
Component: general (show other bugs)
Version: master
Platform: Manjaro Linux
: NOR normal
Target Milestone: 1.0
Assignee: David Edmundson
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2020-10-14 15:40 UTC by elman
Modified: 2021-03-08 08:30 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed In:

Attachments
mouse jumps (174.37 KB, video/x-matroska)
2020-10-14 15:40 UTC, elman 		Details
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Description elman 2020-10-14 15:40:32 UTC 
Created attachment 132353 [details]
mouse jumps

SUMMARY
I use Bluetooth mouse. When I leave it inactive for about 3 seconds and then move it, cursor doesn't update its position for a short time (maybe 100 ms) and then jumps into new position. It looks like mouse gets disconnected after 3 seconds and then it needs to reconnect, when I move the mouse. This issue was not present with 5.19.

STEPS TO REPRODUCE
1. Connect bluetooth mouse
2. Wait for cca 3 seconds
3. Move mouse

OBSERVED RESULT
Mouse cursor jumps.

EXPECTED RESULT
Curso movement should be immediate and fluid 

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Manjaro Testing
KDE Plasma Version: 5.20.0
KDE Frameworks Version: 5.75.0
Qt Version: 5.15.1
Comment 1 elman 2021-03-08 08:30:32 UTC 
I found out that this is not a Plasma bug because it also manifests on Mint with Cinnamon. It can be fixed by setting kernel parameter btusb.enable_autosuspend=0 . See https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1801642 for more info.