Comment 24 for bug 535653

I've been having the same problem here with my x100e. My machine shipped with BIOS 1.21 and EC version 1.17. I have the final release of 10.04 installed (had to install Ubuntu, then KDE separately because Kubuntu hung on Services startup). However, this morning, I ran the update and upgrade, then made sure my fglrx drivers were the latest and greatest, and I can unplug my machine, adjust my brightness, and I am no longer tethered to the AC power. My kernel name is 2.6.32-21-generic and the version is #32-Ubuntu SMP dated Fri. Apr. 16 08:09:38 UTC 2010 if that helps.