I have also seen this kernel oops. For me it is repeatble if I try "iwlist scan" when then card is not yet enabled through the network manager. If the card has been enabled then everything works fine.
-- system half-hangs after wifi scan https://launchpad.net/bugs/48642 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
