Comment 7 for bug 475428

This looks like download from screen bug. You can disable the feature with
Option "EXANoDownloadFromScreen" "on"
in xorg.conf

On Thu, Dec 24, 2009 at 12:50 AM, hansvw <email address hidden> wrote:

> Experienced the same issue on an older radeon card (radeon 8500)
> following an automated update of xserver-xorg-video-radeon (update
> manager suggestion). Solved the issue by adding some sections to the
> auto-configured xorg.conf. Notably changing to the older "XAA"
> AccelMethod appears to fix the issue:
>
> Section "Device"
> Identifier "Radeon 8500"
> Driver "ati"
> BusID "PCI:1:0:0"
> Option "XAANoOffscreenPixmaps"
> Option "AccelMethod" "XAA"
> Option "EnablePageFlip" "true"
> Option "TripleBuffer" "true"
> EndSection
>
> Section "Monitor"
> Identifier "Configured Monitor"
> EndSection
>
> Section "Screen"
> Identifier "Default Screen"
> Monitor "Configured Monitor"
> Device "Radeon 8500"
> EndSection
>
> --
> font corruption with xserver-xorg-video-ati driver
> https://bugs.launchpad.net/bugs/475428
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