Comment 1 for bug 435571

There is already a check for /device which is eventually stripped out. The problem with the kernel 2.6.31 is that /sys/class/hwmon/hwmon0/device apparently still exists so that check fails.
Waiting to find a proper solution upstream that maintains compatibility with older kernels, I made an horrible hack that should work for karmic (hopefully it doesn't break anything else). Can you check it out? The package is available in my ppa:

https://launchpad.net/%7Enorsetto/%2Barchive

If you do that please check if it still works for vol too, not just temp, and also if the device is not specified or specified as *.
(I can't test myself as my VM stopped working after the latest karmic upgrade).

PS. If in the future you open a bug also upstream, can you please link it to the launchpad one?