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I just updated to the latest version (11.04) yesterday, and ever since then, the system has been really choppy.

I used to have 10.10 installed, and that was running smooth.

Anyone also experiencing this? Any fixes?

I'm only running Chrome and Netbeans...

Jorge Castro
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xil3
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  • I have already posted a bug regarding the same and it has been marked as duplicate of bug no:763005 And the original bug has been approved by Canonical, so expect a solution from Ubuntu. You can follow the development of this at: Launch pad bug link: 763005 – Abhijeet May 04 '11 at 13:53

3 Answers3

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  1. Install CompizConfig SettingsManager

    sudo apt-get install compizconfig-settings-manager

  2. Click on the Composite tab, and un-check Detect refresh rate.

    enter image description here

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  3. Click on the OpenGL tab, and un-check Sync to Vblank.

    enter image description hereenter image description here

Community
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Alan
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  • Done - is this something that should take effect immediately, or is a restart required? – xil3 Apr 29 '11 at 16:06
  • Oh wow... never mind - it seems to have fixed the issue, for the most part. It's not perfect still, but a lot better. – xil3 Apr 29 '11 at 16:07
  • I have an ATI card too, and Unity was SOOOO choppy at first. but disabling that helped a lot. There are a few more options in Compiz related to tweaking the refresh rate that you may want to look into. Glad it all worked out for you. – Alan Apr 29 '11 at 17:22
  • xil3, I updated my answer with another step that may also help you. – Alan Apr 29 '11 at 20:39
  • This didn't help a bit. Even typing in Firefox makes the CPU jump to 50% (well, 100% for one core). – ziggystar May 08 '11 at 18:03
  • Hmm, that sounda like you may be having a separate problem. Perhaps try creating a new question, stating that you've read, and tried all of the similar questions. But the fact that your CPU jumping that high makes me think it is something else. – Alan May 08 '11 at 23:43
  • Also happening to me.. I have implemented the solution you have listed but it only helps a bit. – rlemon Jan 05 '12 at 21:01
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I had same problem, but, however, in my case adjusting compiz settings didn't help a lot.

I also had ATI drivers installed. Then I noticed ATI had JUST released new ones, which are said to have much better supprot for the latest X and Unity. However, ATI released them too late, and they failed to get into Ubuntu repositories.

What I reccoment you is to uninstall the ATI driver (fglrx) Ubuntu installed for you, and get the newest one from the ATI's site: http://support.amd.com/us/gpudownload/Pages/index.aspx

In my case this provided incredible improvement of overall performance. I hope it will help you too!

Rafał Cieślak
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This link aways help me with my Radeon

http://wiki.cchtml.com/index.php/Ubuntu_Natty_Installation_Guide#Removing_Catalyst.2Ffglrx

Gabriel Campos
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