Do you have a intel wireless 3945 card? In that case, this is probably a duplicate of bug 63418.
Workaround: *enable* wireless during booting. -- soft lock detected on CPU#0 (system crashed) after acpi sleep event problem https://launchpad.net/bugs/69086 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
