Tested Live Lucid http://old-releases.ubuntu.com/releases/lucid/ubuntu-10.04.4-desktop-amd64.iso. Result: same as in Precise, that is, the screen brightness applet reacts to the hotkeys but the screen brigthness does not change.
Tested Live Lucid http:// old-releases. ubuntu. com/releases/ lucid/ubuntu- 10.04.4- desktop- amd64.iso.
Result: same as in Precise, that is, the screen brightness applet reacts to the hotkeys but the screen brigthness does not change.