I own an Intel DG965WH mainboard with onboard graphics Intel GMA X3000. The xserver still complains about a missing /dev/agpgart and too low videoram.
See https://launchpad.net/distros/ubuntu/+source/xserver-xorg- driver-i810/+bug/62135 -- Backport Intel 965 Express chipset support from 2.6.18 https://launchpad.net/bugs/61342 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
