Finally fixed!!!
Solution:
I just removed the battery and kept down the power button about 20 seconds, that was enough to get back BIOS setup access. Then, just waited for grub, selected Ubuntu's advantage options and the first available option with "(recovery mode)". Turned off again and could start normally.
This solution was reached with trials and erros. Maybe there's something on the manual.
Never more I gonna try hibernate in Ubuntu.
Thanks.