Comment 11 for bug 38181

I found out that in the Bios of my computer the AGP capability mode was set to 4x. Indeed, the Radeon 8500 LE supports this mode. However, the xorg.conf file generated by issuing the command dpkg-reconfigure xserver-xorg contains following device section:

Section "Device"
        Identifier "ATI Technologies, Inc. Radeon R200 QL [Radeon 8500 LE]" Driver "ati"
        BusID "PCI:1:0:0"
        Option "UseFBDev" "true"
EndSection

I added the 4x mode as follows

Section "Device"
        Identifier "ATI Technologies, Inc. Radeon R200 QL [Radeon 8500 LE]" Driver "ati"
        BusID "PCI:1:0:0"
        Option "UseFBDev" "true"
        Option "AGPMode" "4"
EndSection

Interestingly, the glxgears crashes that occured when quickly moving the glxgears window around on the desktop disappeared. Also, 3D games such as Tuxracer and 3D screensavers seem to run without freezing my computer.

However, when e.g. surfing the net with Firefox/Konqueror for a given time, my computer still freezes hard after some time. As mentionned before, this seems to be related to another bug, maybe due to the wireless (atheros) madwifi driver or the network-manager I use.