Comment 63 for bug 28925

My small patch was accepted in upstream, so this might be now fixed in the latest GIT version of xserver-xorg-video-ati, but not yet available in Ubuntu development branch feisty. This bug should only be marked "Fix Released" when new enough ATI driver is fetched to Ubuntu.

If you want to test it with feisty, something like this should work:

1. sudo apt-get build-essential install debhelper pkg-config xserver-xorg-dev x11proto-gl-dev x11proto-xext-dev x11proto-core-dev x11proto-video-dev x11proto-xinerama-dev x11proto-xf86misc-dev libgl1-mesa-dev x11proto-fonts-dev x11proto-randr-dev x11proto-render-dev libdrm-dev x11proto-xf86dri-dev quilt
2. git clone git://anongit.freedesktop.org/git/xorg/driver/xf86-video-ati
3. cd xf86-video-ati
4. sh autogen.sh && ./configure --prefix=/usr
5. Edit config.h file and add the following lines:
#define PACKAGE_VERSION_MAJOR 1
#define PACKAGE_VERSION_MINOR 2
#define PACKAGE_VERSION_PATCHLEVEL 2
6. make
7. sudo make install
8. edit xorg.conf to use Driver "ati" and restart X