Comment 13 for bug 269831

I've now managed to get this working. It involved patching and recompiling simply the toshiba_acpi module, then manually installing the module. Since I don't really understand what I'm doing, I don't know if this is the easiest way to get it to work, but it fixed the problem for me.

I've put a step-by-step guide on the Ubuntu forum here: http://ubuntuforums.org/showthread.php?p=6203606#post6203606

To try and answer questions individually in case it's still useful:
Andy Whitcroft: I'd figured out the same as you about commenting out the line in toshiba_acpi.modprobe, however this caused the modprobe to silently fail. No output, but lsmod would not find it.

Ante Karamatić: I guess the patch that shipped is the one I applied? Even though it says 'historic reference,' it's very much needed: http://memebeam.org/free-software/toshiba_acpi/

Apparently because of the patch, it's not possible to load the toshiba and toshiba_acpi modules simultaneously - I don't know what the toshiba one does though, I don't seem to need it. Depending on which is loaded first, the second gives a "device or resource busy" error. I think this is because they both create/use /dev/toshiba ?

Andy Whitcroft: I'll download and try that kernel now.