I filed a detailed report at https://bugzilla.kernel.org/show_bug.cgi?id=44221.
I gave dmesg, dmidecode, lspci -vvnn, /proc/interrupts and /proc/mtrr info. I hope this is of some help to you guys! Thanks for walking me through this strange situation. :) -Denny ** Bug watch added: Linux Kernel Bug Tracker #44221 http://bugzilla.kernel.org/show_bug.cgi?id=44221 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1019496 Title: Ubuntu 12.04 hangs on reboot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1019496/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs