https://bugzilla.kernel.org/show_bug.cgi?id=13170
--- Comment #68 from Mikel Pr mikeloco14@gmail.com 2012-03-05 06:07:53 --- MY apologies. While it does boot now without acpi=off or nosmp/maxcpus=1, only one core is reported in /proc/cpuinfo and in Ubuntu's system-report option in 12.04.