root@ubuntu:~# export DISPLAY=:0
root@ubuntu:~# AMDOverdriveCtrl --help
INF: Nr. of Adapters: 12
INF: Adapter index: 0, active, ID:23433696, AMD Radeon HD 6900 Series
INF: Adapter index: 1, inact., ID:23433696, AMD Radeon HD 6900 Series
INF: Adapter index: 2, inact., ID:23433696, AMD Radeon HD 6900 Series
INF: Adapter index: 3, inact., ID:23433696, AMD Radeon HD 6900 Series
INF: Adapter index: 4, inact., ID:23433696, AMD Radeon HD 6900 Series
INF: Adapter index: 5, active, ID:25905232, AMD Radeon HD 6900 Series
INF: Adapter index: 6, active, ID:28020496, AMD Radeon HD 6900 Series
INF: Adapter index: 7, inact., ID:28020496, AMD Radeon HD 6900 Series
INF: Adapter index: 8, inact., ID:28020496, AMD Radeon HD 6900 Series
INF: Adapter index: 9, inact., ID:28020496, AMD Radeon HD 6900 Series
INF: Adapter index: 10, inact., ID:28020496, AMD Radeon HD 6900 Series
INF: Adapter index: 11, active, ID:30493504, AMD Radeon HD 6900 Series
Usage: AMDOverdriveCtrl [-h] [-b] [-a] [-c <num>] [-i <num>] [profile name]
  -h, --help                    displays help on the command line parameters
  -b, --batch-mode              only set profile, no GUI
  -a, --enable-app-profiles     activate the app profile feature
  -c, --color-temp=<num>        set color temperature
  -i, --adapter-index=<num>     choose adapter index (taken from console output)
root@ubuntu:~#