Exceptionally high CPU usage when moving cursor in GNOME

Ask Fedora
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1

Anyone else have problem with mouse movement causing exceptionally high CPU usage? From what I gather, gnome-shell gets flooded with mouse instructions. Devices with lower polling rate like the touchpad causes less stress, but still far too high CPU usage to be reasonable. Higher polling rate like my Logitech G305 can reach 100% single core utilization when flicking back and forth on empty desktop. (+20% total CPU cost), devastating when gaming, which I tend to do with an underclocked CPU.

Are there any solutions to this? or help on how to troubleshoot/fix the issue?

System:
Lenovo Yoga 530, Ryzen 2500U with Vega 8 graphics
Fedora 43
Kernel 6.19.11
Kernel Driver: amdgpu, MESA 25.3.6
Vulkaninfo: AMD Radeon Vega 8 Graphics (RADV RAVEN)
Session: Wayland, OpenGL

… doesn’t seem like it’s reverting to software rendering…

2

it’s kind of funny, this issue has been persistent for weeks through several updates. I updated Fedora this morning and it’s gone. :sweat_smile: oh well, hopefully the bug won’t come back. :slight_smile:

3

I think I found the culprit. I was using Lutris in the background, and when activating gamescope for games with the gamescope “fps limit” activated seems to have triggered this issue on an OS level… It dissappeared when restarting the computer, but once I went into a game it appeared again. So…

My solution has been to disable gamescope’s FPS limit and use mangohud (goverlay) built in FPS-limiter instead. This helped the computer to stay cool and the the mouse movement no longer affected performance.