Mouse lagging occasionally

samik4184 · June 8, 2019, 9:38pm

Hi,
I have this issue since 15.0, didn’t dissappear after upgrade to 15.1. Occasionally, the mouse cursor starts to slow down, eventually even stops with no reasonable way to reproduce the behaviour (it happens with no system load but on 100% CPU and memory load mouse works perfectly).
It is an USB wireless mouse.
Thanks for help

deano_ferrari · June 8, 2019, 10:50pm

This is likely a graphics-related issue rather than a problem with the mouse. As such some system and graphics details might help others advise further here…

inxi -SMGxx

samik4184 · June 9, 2019, 7:20pm

linux-051o:~ # inxi -SMGxx
Resuming in non X mode: glxinfo not found. For package install advice run: inxi --recommends
System:    Host: linux-051o Kernel: 4.12.14-lp151.28.4-default x86_64
           bits: 64 gcc: 7.4.0
           Console: tty 0 dm: sddm,sddm Distro: openSUSE Leap 15.1
Machine:   Device: desktop Mobo: ASRock model: J4105-ITX serial: M80-BB002600908
           UEFI: American Megatrends v: P1.40 date: 08/06/2018
Graphics:  Card: Intel Device 3185 bus-ID: 00:02.0 chip-ID: 8086:3185
           Display Server: X.org 1.20.3 drivers: modesetting (unloaded: fbdev,vesa)
           tty size: 88x32 Advanced Data: N/A for root

deano_ferrari · June 9, 2019, 8:42pm

Something to check - are your mouse batteries ok?
The posted output shows Intel graphics and the desktop is KDE? If so, try changing the compositor type…

System Settings > Display and Monitor > Compositor > Rendering backend

Once applied, check if this changes behaviour.

samik4184 · June 9, 2019, 10:18pm

Thanks a lot, batteries were fine, changing compositor to XRender helped (btw is it still faster to use XRender than openGL as it was back in Qt4 times? ) so after a little bit of fiddling it was the Scale Method settings set to Accurate.
Weird enough, on https://userbase.kde.org/Desktop_Effects_Performance it says that on Intel, Accurate should be disabled by default, all other options work just fine with all the Compositor backends. Should I file a bug for that?

deano_ferrari · June 9, 2019, 10:23pm

Glad to read of your progress here.

Weird enough, on https://userbase.kde.org/Desktop_Effects_Performance it says that on Intel, Accurate should be disabled by default, all other options work just fine with all the Compositor backends. Should I file a bug for that?

Yes, I guess there might be merit in doing that.

mrmazda · June 10, 2019, 1:09am

When not run inxi after installing what it recommends, and not run from within X, the whole story isn’t reported.

8086:3185 is absent from http://pci-ids.ucw.cz. You might consider sharing there what it is you have (Gemini Lake?).

samik4184 · June 10, 2019, 11:39am

Guess it was the glxinfo missing. Now it looks more neat

linux-051o:~> inxi -SMGxx
System:    Host: linux-051o Kernel: 4.12.14-lp151.28.4-default x86_64
           bits: 64 gcc: 7.4.0
           Desktop: KDE Plasma 5.12.8 (Qt 5.9.7) dm: sddm,sddm
           Distro: openSUSE Leap 15.1
Machine:   Device: desktop Mobo: ASRock model: J4105-ITX serial: N/A
           UEFI: American Megatrends v: P1.40 date: 08/06/2018
Graphics:  Card: Intel Device 3185 bus-ID: 00:02.0 chip-ID: 8086:3185
           Display Server: x11 (X.Org 1.20.3 )
           drivers: modesetting (unloaded: fbdev,vesa)
           Resolution: 1920x1080@60.00hz
           OpenGL: renderer: Mesa DRI Intel UHD Graphics 600 (Geminilake 2x6)
           version: 4.5 Mesa 18.3.2 (compat-v: 3.0) Direct Render: Yes