The issue of "General System Sluggishness" may be due to a bug with autodetection of display refresh rate in Compiz or Ubuntu. This would explain why both Nvidia and ATi users are effected.
Example: If refresh rate is being polled at 59.88Hz, Ubuntu or Compiz is rounding down to 50Hz instead of setting refresh to 60Hz. I was having major issues with video playback skipping in VLC before I manually set the refresh rate. Also when I manually set the refresh rate through CompizConfig Settings manager, Ubuntu desktop performance improved significantly. I posted full steps to the The Nvidia steps only need to be done by Nvidia users to fix tearing/VSync issues for video playback. Follow the steps and see if it solves the problem... Credit goes to shaundennie http://www.nvnews.net/vbulletin/showpost.php?p=1586479&postcount=13 IMPORTANT!! To Fix Compiz Display issues!! ------------------------------------------ STEPS: Compiz Configuration 1. Download CompizConfig Settings Manager from Ubuntu repository. 2. Navigate to.. System --> Prefences --> CompizConfig Settings Manager 3. Navigate to.. General --> General Options 4. Click "General Options" to open window 5. Click "Display Settings" tab 6. Uncheck "Detect Refresh Rate" 7. Move "Refresh Rate" slider to 60, or set 60 in the box 8. Check "Sync to VBlank" 9. Click back button to move back to main CompizConfig window 10. Navigate to.. Utility --> Video Playback 11. Uncheck "Video Playback" then exit the CompizConfig Settings Manager. STEPS: Nvidia Configuration 1. Pull up nvidia-settings .. Navigate to.. Applications --> System Tools --> nvidia-settings .. or open a terminal, type "nvidia-settings" , press enter 2. Click "X Server XVideo Settings" 3. Check "Sync to VBlank" _IF_ not checked 4. CLick "OpenGL Settings" 5. Uncheck "Sync to VBlank" _IF_ checked 6. click quit button 7. click quit button 8. Reopen nvidia-setting to verify that config changes were saved. .. IF they were saved, you are done with step 8. .. IF they were not saved, ~/.nvidia-settings-rc in your home directory .. may be under root permissions. You will need to chown chgrp for the file. .. Then you will need to start back at Step 1 and repeat all steps. IMPORTANT: Reboot your machine when finished. The driver changes won't function correctly until you reboot -- xorg 10-20% cpu usage after intrepid upgrade, general system sluggishness https://bugs.launchpad.net/bugs/294972 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
