When attempting to install Ubuntu Dapper on an old G3 iMac DV, I kept running into stupid display problems (the boot process simply stopped at a blank black screen). After a bit of research, I finally discovered how to fix this problem, and will record it here for myself…
drop to console (ctrl - option F1)
** if you need to log in use the name ubuntu to log in. **
sudo nano /etc/X11/xorg.conf
change the frequencies in monitor section as follows:
** find this part in the file you are now in (xorg.conf) and make these changes **
Section “Monitor”
Identifier “Generic Monitor”
Option “DPMS”
HorizSync 60-60
VertRefresh 43-117
EndSection
** after the changes then type command-o, then command-x (save and exit nano)
** restart X by running the following:
sudo killall gdm
sudo /etc/init.d/gdm start
That should do it…
