Same problem on an HP Pavilion dm1 with ATI Radeon using open source drivers. Occured after upgrade to 12.10.
Screen is purple while booting, flickering a few times. Log-in sound plays, but screen remains purple. Cannot Ctrl-Alt-F1 to terminal.
One interesting point - if AC adapter is connected while GRUB is running, system boots fine.
Same problem on an HP Pavilion dm1 with ATI Radeon using open source drivers.
Occured after upgrade to 12.10.
Screen is purple while booting, flickering a few times. Log-in sound plays, but screen remains purple.
Cannot Ctrl-Alt-F1 to terminal.
One interesting point - if AC adapter is connected while GRUB is running, system boots fine.