Thank you. Can you please try booting with the acpi=off or pci=noacpi parameter, you can edit the boot using the edit option in the grub boot menu.
-- installed updates today at about 10:30pm EDT, Ubuntu will not boot, fails on line 50.884000 https://launchpad.net/bugs/96784 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs