I believe that the calibration is supposed to be done with a colorimeter and the button is grayed out because there's no colorimeters connected:
https://help.ubuntu.com/stable/ubuntu-help/color-calibrationdevices.html -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1452096 Title: "Calibrate" in Systems Stettings -> Color disabled. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-settings-daemon/+bug/1452096/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
