Same problem here with Belkin F5D7000 PCI wireless card. Freezes the computer if its enabled and blocks booting. Must boot with live cd to fix and disable.
-- Ralink Wireless USB/PCMCIA/PCI hangs PC https://launchpad.net/bugs/34902 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs