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I noticed today that my mouse cursor stutters a lot on this system here, as in: Its position is not updated more ofthen than ~5 times per second (sometimes even less frequently while I move the mouse) and it seems like some clicks are lost, although the speed of the mouse stays the same.
I tried to disable compositing in KWin, but the effect is still there (a bit weaker but that might just be a hunch). The weird thing is that everything else still renders smoothly without any perceivable stutter. The system load viewer shows no more than 5-10% CPU utilization at all time.
I looked through the pacman.log for any package upgrades which might be related:
[2015-04-25 14:24] [ALPM] upgraded mesa (10.5.3-1 -> 10.5.4-1)
[2015-04-25 14:24] [ALPM] upgraded lib32-mesa (10.5.3-1 -> 10.5.4-1)
[2015-04-25 14:24] [ALPM] upgraded lib32-mesa-libgl (10.5.3-1 -> 10.5.4-1)
[2015-04-25 14:24] [ALPM] upgraded mesa-libgl (10.5.3-1 -> 10.5.4-1)
...
[2015-04-29 17:05] [ALPM] upgraded linux-firmware (20150206.17657c3-1 -> 20150410.ec89525-1)
[2015-04-29 17:05] [ALPM] upgraded linux (3.18.6-1 -> 4.0.1-1)
...
[2015-05-03 13:54] [ALPM] upgraded libxt (1.1.4-1 -> 1.1.5-1)
[2015-05-03 13:54] [ALPM] upgraded libxrender (0.9.8-1 -> 0.9.9-1)
[2015-05-03 13:54] [ALPM] upgraded libpciaccess (0.13.3-1 -> 0.13.4-1)
But after downgrading these (and rebooting), the mouse cursor still stutters. Furthermore, it would be weird if an update from five days ago caused this problem. I remember that I played a game yesterday with the mouse, and while I had some of the stuttering effects (which I attributed to the game at the time), it was nowhere as noticeable as now.
Does anyone know these issues? I don't quite know where in the graphics stack to look for answers.
Last edited by majewsky (2015-05-04 19:50:36)
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