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Just running the new Ubuntu, I've noticed that my Windows don't move smoothly around the screen. Instead, they're jumpy and jerky.

I have a GeForce 560ti. This is a higher end video card. I'm perplexed as to why something so simple as Windows compositing is so difficult.

Yes, I am using the nvidia binary drivers.

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See a demonstration here: youtube.com/watch?v=ZTHCbvPcWsY –  Omega Apr 30 '11 at 21:13
    
I have heard similar reports of performance issues. It has been reported that this issue happens on NVidia system after using Unity for a little while. Could be a driver issue. I will post updates on the bug report you created. –  user16328 May 3 '11 at 21:46
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closed as off topic by belacqua, jrg May 23 '12 at 17:18

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I have created the following bug over at launchpad regarding this issue:

https://bugs.launchpad.net/ubuntu/+source/unity/+bug/774414

This appears to be an issue with compiz. Anyone experiencing this same issue is encouraged to head over there and add their voice to the discussion.

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To me it sounds like it could be vblank-related.

See the answer to this question for disabling it.

Let me know if that works and I'll close this as a duplicate.

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Nope, doesn't help. Windows still jump around. –  Omega Apr 30 '11 at 20:03
    
@Omega Tried firing in compiz --replace after changing the setting? –  Oli Apr 30 '11 at 20:04
    
Just did that now to be certain, and no. No luck. Windows are still VERY jumpy when I try to move them around. –  Omega Apr 30 '11 at 20:05
    
I just tried running glxgears and the performance is absolutely dreadful. Almost completely hangs my desktop. Seems like 3D is seriously broken with compiz and/or Unity on 11.04?! –  Omega Apr 30 '11 at 20:10
    
I should add, this system runs 3D games just fine under Windows 7. –  Omega Apr 30 '11 at 20:10
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