Comment 8 for bug 288414

Performed a fresh installation of ubuntu 8.10 on the same machine -
worked perfectly until I upgraded to nvidia-177.80 and kubuntu-desktop / kde-i18n.

Having installed kdm and ubuntu I wasn't able to reboot into graphical mode.

Solution was to switch back to gdm as default display manager - brings back X after reboot. Last log message was:
[ 96.995383] mtrr: base(0xd0000000) is not aligned on a size(0xff00000) boundary