April 29, 2010 · General · Email This Post

With older ATI graphics cards with 32MB or less of video RAM some corruption of direct rendered windows, for example OSD notifier windows, might appear. This may be worked around by disabling ‘RenderAccel' in the Xorg configuration.

To do this first exit to the console using the following command:

sudo service gdm stop

Then create an Xorg configuration file with the command below:

sudo Xorg -configure

Then add the ‘RenderAccel' option to /etc/X11/xorg.conf:

Section "Device"
...
Driver "radeon"
Option "RenderAccel" "off"
EndSection

And restart X/GDM.

sudo service gdm start

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3 Comments to “Fix Window corruption with older ATI graphics cards in Ubuntu 10.04 (Lucid)”

  1. Jay says:

    wish i could find a fix for my ati radeon 2400XT HD card :(

    [Reply]

  2. Jay says:

    aw…will give that a try. thanks..

    [Reply]

  3. kingfisher says:

    After this mod, my lucid locked up at Plymouth screen, and would not boot. Had to recover /etc/X11/xorg.conf to previous condition to re enable Ubuntu bootup.

    It is unlikely that anyone new to Ubuntu would have been able to rectify this condition, and would be left with an unusable PC.

    Any suggested modifications such as this should carry a warning and detailed instructions of how to undo the modifications from the (normal boot) unbootable machine

    [Reply]

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