I thought I'd just add that I also got this issue, and the workaround mentioned (changing PCMCIA=yes to =no) worked, however I'm not using an ASUS motherboard - I'm using an ASRock K7S8X (details: http://www.asrock.com/product/K7S8X.htm ).
-- [feisty][linux-image-2.6.19-7] PCMCIA bridge driver i82365 causes "BUG: soft lockup detected on CPU#0!" on Asus motherboards https://launchpad.net/bugs/72895 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs