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...

  • 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 4, 2011 at 13:53

3 Answers 3

  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

    enter image description here

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

    enter image description hereenter image description here

  • Done - is this something that should take effect immediately, or is a restart required?
    – xil3
    Apr 29, 2011 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, 2011 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, 2011 at 17:22
  • xil3, I updated my answer with another step that may also help you.
    – Alan
    Apr 29, 2011 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 8, 2011 at 18:03

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!

  • 1
    Overemphasise text much? Feb 2, 2012 at 23:43

This link aways help me with my Radeon


  • 1
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    Aug 29, 2012 at 11:29

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