How to "turn off" second monitor

Discussion in 'Mac Pro' started by Killerbob, Aug 9, 2014.

  1. Killerbob macrumors 6502a

    Jan 25, 2008
    I have two monitors connected to my nMP, an ATD and an ACD. Everything is great, except when I watch a movie using VLC. I full screen the movie, and the other monitor is still on. I can turn down the brightness to the absolute minimum, but it is still on, and in an otherwise dark room it is annoying.

    Is there a way I black out the other monitor entirely, without unplugging it from the nMP?
  2. omvs macrumors 6502

    May 15, 2011
    SwitchResX has an option for disabling, but I haven't had much luck since 10.8. Not aware of a way to do this in OSX anymore... :(

    With my old iMac, I commonly disconnected the second monitor when not in use since the video card would burn 20-30 extra watts just having a second monitor attached. So my crappy workaround was to use a USB extender cable to power my mDP -> duallink DVI converter. By disconnecting the usb, the iMac wouldn't see the monitor anymore, and the monitor would go into sleep mode without any signal. You could probably do the same thing if you're using a converter with your ACD.
  3. OLDCODGER macrumors 6502a

    Jul 27, 2011
    Lucky Country
  4. Moonjumper macrumors 68000


    Jun 20, 2009
    Lincoln, UK
    VLC Preferences. Go to the Video page. Select "Black screens in Fullscreen mode". Restart VLC to activate the change.
  5. Killerbob thread starter macrumors 6502a

    Jan 25, 2008
    I tried the VLC setting, but it has no effect on the second monitor...

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