its a k8m890... whitout support.
try to edti your /etc/X11/xorg.conf and put "vesa", in your driver line, in Device Section... and then put an low resolution i.e. 800x600, then start config-system-display --reconfig.
select another resolution, but not another driver. the only driver that funtion its a VESA. See the via web page for drivers (Im fail to make it work)