I am connecting an external monitor to a MBP with a MiniDP-DVI adapter to which I connect a DVI cable going to a monitor.
The monitor usually doesn't wake up from sleep. I have been unable to use the monitor and gave up for a couple of months. I then used the exact same cable combination and the monitor successfully for two days in a row (a couple of days ago). Now I can't get it working once again. The monitor in question is Dell U2311H.
I noticed a couple of things:
- once I connected a USB mouse to a MBP, there was 2 seconds of blue screen on Mac screen (not sure but it might have also been blue on the external monitor).
- if I disconnect the DVI cable from the adapter and reconnect, 2 seconds of blue screen are shown on Mac, but external monitor doesn't react
- unplugging and plugging the adapter-cable combination does nothing
- resets don't help
Is there a procedure to get this working (e.g. unplug cables, restart, plug again)?