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I updated to Ubuntu 22.04 today and I noticed that anything related to gnome like window dragging, searching or scrolling through the activity windows, moving my mouse through the dock is quite slow and laggy now.

I already use the proprietary and tested NVIDIA driver and tried to turn different things on and off, also the X.Org X Server driver had the same issues.

Was not able to find the cause of this problem.

Thanks in advance! If you need any further system related information please let me know

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  • Same here. I didn't have time to investigate why... but yes.. moving windows feels awful and slow
    – Juan Leni
    Jun 3, 2022 at 6:46
  • discourse.ubuntu.com/t/22-04-nvidia-drivers/28072 backup you /etc/environment and add > __GL_SYNC_TO_VBLANK=0 to it. Try it.
    – Dami
    Jun 7, 2022 at 1:03
  • 2
    @Dami, export __GL_SYNC_TO_VBLANK=0. Right?
    – ENIAC
    Jun 29, 2022 at 15:05

2 Answers 2

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Changing mouse polling (e.g. using Piper) has fixed this issue for many users.

Nvidia driver 525 or mutter updates in gnome might also fix this issue which seemed to get worse in 22.04 (see the last comments here).

I did both the /etc/environment change as well as the polling change, and restarted. Not sure what fixed it or if it is truly fixed, but right now it feels ok.

Edit: Leaving the other solutions up, as they have worked for others, but for me... right after doing this, I opened slack and discord. Then I noticed the issue was back.

closing discord resolved the issue, opening discord then brought it back.

looking it up, it seems that disabling advanced > hardware acceleration is a thing, and seems to have actually fixed the issue, thank god.

crossing fingers, but I really think I nailed it now that I was able to reproduce it so consistently. Didn't realize it was discord since I just always have it running in the background. I suspect it was attaching to the wrong GPU or something? No idea, but jeez, terrible that it can cause every other windows to lag while dragging, what thing.

edit a few days later: the issue is indeed solved for me, this also substantially reduced my CPU usage, which often showed the temps completely maxed out even though the processor and gpu did not show high utilization--I presume it was the iGPU that was being maxed out? anyways, just giving a follow up here.

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  • Upgrading to 525 did the trick for me. Dragging windows is smooth as butter now.
    – Chris Hayes
    Dec 4, 2022 at 21:52
  • Yup, been experimenting with early release on 525. I have a different, similar issue in 525 though--if I have external monitors and am in hybrid mode, there is some stuttering when dragging windows. not quite as bad, but also don't yet see a fix for it.
    – Kyle Baker
    Dec 7, 2022 at 5:31
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Open /etc/environment e.g.:

sudo gedit /etc/environment

Add top line

export __GL_SYNC_TO_VBLANK=0

Directly after this drag and moving windows should be super fast ;)

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