https://bugzilla.kernel.org/show_bug.cgi?id=44851
--- Comment #9 from Peter energonic@gmail.com 2013-05-13 17:40:37 --- Created an attachment (id=101301) --> (https://bugzilla.kernel.org/attachment.cgi?id=101301) dmesg.txt file
Booted system from arch boot CD. Mounted main mac disk partition for arch (that doesn't boot since upgrade to kernel 3.9.2). chroot to that partition. Run dmesg and pipe output to external disk.