This is my issue: one of my two monitors doesn't react to the buttons. that means no osd, no powering on/off, no changing the brightness.
- windows 8 / linux dualboot
- one nvidia geforce 670
- an old apple cinema display
- a more recent iiyama monitor
The monitor being affected seems to depend on the dvi port on the graphics card they are connected to. Switching the port on the card makes the other display ignore its controls (and the first react to its own again, ruling out a hardware defect on either one)
How can I reenable the hardware buttons or change the brightness and turn on/off a specific monitor via software?