On my computer, it happens even if the AC is unplugged! I just have to turn it off and then back on, and generally, I have to do it two times. Adding the 'noapic' option at kernel boot (in /boot/grub/menu.lst) resolved the problem (I also tried with noacpi but this won't let my computer boot!).
-- [Hardy] ACPI Embedded Controller (EC) stops boot when kernel boot 'quiet' option is enabled or AC power is connected https://bugs.launchpad.net/bugs/191137 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs