Lots of people with poor hand dexterity use keyboard shortcuts when the mouse or any pointing device is not suitable for their (dis)ability.
For example, I can mouse to change the volume control maybe in 5 to 10 seconds depending on my state of control in at the time. Or in 95% of the time I can hit keyboard shortcut right way. Since 12.04 I've been mapping Alt+', Alt+, to the sound and media's mute, volume down, and volume up under the
System Settings >
It worked as long as I didn't reboot or log out, where it just didn't seem to read the set values in again. Now in 13.04 it looks like the system just forget them after a few minutes.
How do I fix this, as well as the losing of keyboard shortcuts on log out, and is there any good user document on keyboard mapping?