I've had this problem with all 12.10 *buntu distros...
It's an HP Pavilion G6, single boot, encrypted installation, lubuntu 12.10.
Every other time I turn my laptop on, after I get the "HP" screen, I get a blank screen (like black, no backlight whatsoever). It does not resolve until I turn the computer off, turn it back on, and am brought to the grub menu.
What's up with that?
Also, I recently disabled the grub menu (or so I thought), using the following method:
> change "GRUB_TIMEOUT=10" to "GRUB_TIMEOUT=0"
sudo leafpad /etc/default/grub
> sudo update-grub
Which worked for two reboots (did not fix the blank screen issue), and then the menu started popping up again.
Anyone have any insight?