Similar problem now exists in Feisty with my laptop listed above. Instead of completely locking up the machine it just makes the cpu max out at 100% making the laptop extremely slow but still able to shut down safely. Applied acpi=noirq at the end of the boot line in grub and it fixed the problem again. Let me know if you need additional info.
-- [regression] Wired ethernet (VIA VT6102 Rhine II) and Wireless (RaLink 2500) no longer work under 6.06 (needs acpi=noirq blacklisting) https://launchpad.net/bugs/48263 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs