It could possibly be a duplicate of Bug #157213. This issue was fixed after Alpha5 so please get the latest Hardy update packages and recheck it.
If it still doesn't work please attach the following information:
/etc/X11/xorg.conf /var/log/Xorg.0.log output of lspci -vvnn output of sudo ddcprobe output of xrandr
It could possibly be a duplicate of Bug #157213. This issue was fixed after Alpha5 so please get the latest Hardy update packages and recheck it.
If it still doesn't work please attach the following information:
/etc/X11/xorg.conf
/var/log/Xorg.0.log
output of lspci -vvnn
output of sudo ddcprobe
output of xrandr