I did a clean install of Ubuntu 12.04 on a Acer AX1430G desktop. Everything went fine until I installed the additional ATI driver. When I reboot the computer, my monitor gives an "signal out of range" error because I believe the video is being detected at a higher resolution than the monitor supports. How can I force Ubuntu to start up in a lower resolution so that I can adjust display properties. I've already tried editing the
/etc/default/grub and un-commenting
#GRUB_GFXMODE=640x480 line. I know in windows, you can press F8 on boot to go into a safe video mode so I'm looking for the equivalent in Ubuntu.
Thanks for any help!