I am using Ubuntu 12.04 on a desktop and on a netbook. On the netbook, the brightness control works fine out of the box via GUI and hot keys. But on the desktop it does not. In the "Brightness and Locks" UI the brightness slider is missing, so it is only allows turning off of the display and locking.
So I searched about brightness control and found this which points to an external application for external displays.
Does this really mean that brightness control is not for desktop environments by design?
Is it because external monitors bring their own facilities for achieving this? But I am really tired of clicking through these on screen displays just to adjust brightness to daylight changes. I would prefer to use the keyboard as I do on the netbook.
