Thanks! but I actually found a better solution here:https://launchpad.net/distros/ubuntu/+sourc...6.15/+bug/34697Changing the BIOS as follows:Advanced -> CPU Configuration -> Execute Disable Function -> Enabledworks around the bug beatifully. I can now restart X without problems and still use the i810 driver (including 3D acceleration and DVI out)...I also found this:http://www.cs.berkeley.edu/~ushankar/linux-dell.htmlwhich may (or may not) help mmarkvillanueva with his configuration problem (look for 915resolution under "Video support"). For me this was not an issue, so I didn't try this.