Comment 71 for bug 118723

I too had the same 0-11% problem. Mute would work, the volume controls would un-mute but not change volume.
Installing the version form Feisty as suggested in this tread fixed the problem. The display is bigger and uglier, but at least the keys work. ;)

http://packages.ubuntu.com/feisty/utils/kmilo

kmilo-legacy also doesn't seem necessary on my X61.