On Thu, 2008-08-07 at 14:38 +0200, Florian Kulzer wrote: > If you can ssh to the computers and run ddcprobe (in package > xresprobe) then the output should tell you if the attached monitors > are on. (I am currently not at my Linux box so I cannot try it myself.) Fascinating stuff: richard@topaz:~$ sudo ddcprobe ... manufacture: 12 2008 ... Good for warranty claims, I guess :-) Richard