I am just getting started with my own server and thought I could put my old black macbook to some use.
I installed Ubuntu server 11.10 as the only operating system and everything has been working out well so far.
As expected the brightness keys don't work and closing the laptops lid does not put it to sleep or does anything.
As I only want to access the server remotely, I want to disable the screen to save power without having to rip it off.
So far I tried using
xset dpms in all variations.
echo $DISPLAY yields nothing so i think this is the problem.
xset I get the following error:
xset: unable to open display ""
Me being not a linux pro I can only guess that I somehow have to give hi access to my display. Is this a driver issue?