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Possible Duplicate:
Performance being really choppy with ATI drivers

I just upgraded my main machine to Natty. I have an ATI 2600 with the proprietary ATI driver. It worked fine with Maverick on both 3D games and the Compiz desktop.

Now games still work, but merely moving windows laggs really annoyingly. Is there some way to fix this?

Community
  • 1
Martin Ueding
  • 8,436

5 Answers5

4

Install Compiz Config Settings Manager and launch it. You need to follow these steps:

  1. Go to Composite plugin and disable 'Detect Refresh Rate'
  2. In the option below, enter your monitor refresh rate. Mine is 60.
  3. Now go to OpenGL Plugin and disable 'Sync to Vblank'
  4. Logout and come back.
user8592
  • 838
1

Try this out:

  1. Install compiz-manager by sudo apt-get install compizconfig-settings-manager
  2. Go to "CompizConfig Settings Manager"
  3. In OpenGL pluging deselect "Sync to VBlank"
Abonec
  • 249
1

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
  • 21,004
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I have the same issue, but it works a bit better with OpenGL plugin select "Sync to VBlank". It is usable but lags and before upgrading it does not. So it seems to be a bug. That not every thing works well is also shown by the fact that compiz becomes unusable if I set the cube transparent. Than it lags like hell. I hope some expert will find a solution soon. Maybe it has something to do with the ATI-Driver?

Must be a Compiz bug: There is a bug report for this problem, please vote! Compiz effects slow and laggy on Natty with ATI card

user5950
  • 6,406
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Thank you for this answer, but to be honest, I already did this. I am using catalyst version 11.3 (Release Date 4/27/2011) witch is, as fare as I know the latest release. To use this driver instead of those witch are shipped with Ubuntu was my first guess, but it did't work out. Thank you anyway!

user5950
  • 6,406