Linux on UltraNote II hangs on logout or shutdown


Is there a known good installation configuration for Linux on the UltraNote II? I've just installed Debian Wheezy, and I have a bit of a show stopper: attempting to log out or shut down the machine causes it to hang. Is there a known fix for this?

Interestingly, even if I attempt to just run shutdown -h now from within the installer the machine just hangs.

Closing the lid does not appear to make the machine sleep (but that might just be a configuration issue), so there seems to be something very messed up with power support (is this an ACPI issue?)