IBM T60 Function keys

[Joris Dobbelsteen]

Dear,

I have currently put Ubuntu 8.04 LTS on my IBM T60 laptop and run into a 
few little annoyances. One of these is that the function keys work 
rather strangely (or not, but that I can handle).

Display brightness control
* Making the screen brighter works, BUT does not update software state. 
It also shows no on-screen display.
* Lowering brightness works and updates state...
Once brightness is lowered, pressing it will move to the lowest possible 
brightness. Its not gradually, since making it brighter does not update 
the software state.
How can I diagnose/fix this?

For volume control I have three buttons:
* Volume mute, works OK.
* Volume lowering works, but does NOT unmute.
* Volume up works as expected.
How do I fix volume lowering to actually unmute?

Thanks,

- Joris