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I have a mobility radeon 5850 running 11.04 and am running catalyst 11.10 drivers. I noticed that whenever I have two windows open, one of top of the other, scrolling results in minor screen tearing, usually around the border of the window on the bottom.

When I minimize or close the bottom the tearing goes away. I have tear free desktop enabled and tried looking for this specific issue but couldn't find anyone else with it. It happens in both Unity and Classic. Is there any fix for this?

Edit: the tearing doesn't occur in xfce, so i'm thinking it might be related to gnome or compiz

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Is this a fresh installation? Did you had any previous drivers installed? –  Bruno Pereira Nov 15 '11 at 23:55
    
i recently fresh installed 11.04 about a month ago and I noticed that it happened from the very beginning even before catalsyt 11.10 with the default "additional drivers" option enabled as well. –  Kevin Qiu Nov 16 '11 at 0:33
    
How did you remove the old drivers? –  Bruno Pereira Nov 16 '11 at 0:39
    
i deactivated fglrx in the "additional drivers" window, rebooted, and installed using the file from amd's website and did a aticonfig --initial –  Kevin Qiu Nov 16 '11 at 0:40
    
@KevinQiu - in ccsm - opengl plugin can you toggle "sync to vblank" - does that make a difference? –  fossfreedom Nov 18 '11 at 20:59

1 Answer 1

Enable vsync to vblank in the CCSM panel, open a terminal and run

sudo aticonfig --sync-video=on

Reboot your computer

sudo reboot
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sync to blank makes the whole desktop choppy unfortunately. i think i'll just stick with xubuntu for now. –  Kevin Qiu Nov 21 '11 at 20:28

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