I had this problem also. No keyboard or mouse when gdm starts.
I managed to eventually get the keyboard to work by putting: Section "InputDevice" Identifier "blah" Driver "kbd" Option "CoreKeyboard" EndSection
(or something like that) in xorg.conf but I never managed to get the mouse to work. Hence reinstalled 8.04.
My keyboard and mouse are both PS2
I had this problem also. No keyboard or mouse when gdm starts.
I managed to eventually get the keyboard to work by putting:
Section "InputDevice"
Identifier "blah"
Driver "kbd"
Option "CoreKeyboard"
EndSection
(or something like that) in xorg.conf but I never managed to get the mouse to work. Hence reinstalled 8.04.
My keyboard and mouse are both PS2