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I have three monitor outputs from my video card: monitor 1, monitor 2, and a projector.

The Windows display settings looks like this: monitor setup

If the projector is turned off, and I move my mouse to the right of the 2nd screen, it disappears and gets lost in the projector's view, even though the projector is turned off.

It's frustrating when I lose my pointer, but even worse when Windows is placing windows there, so I have to alt+tab + win+left to bring them back in. Some windows can't be moved with win+left so I have to turn on the projector, or pull the HDMI to get a hold of them.

  • I know I can disable the monitor manually
  • win+P can not disable one out of three monitors
  • The projector is a BenQ 3D DLP W1070+

Is it possible to automatically disable the third monitor/projector in Windows if it's turned off?

stiq
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  • What are the connections (HDMI, DisplayPort, VGA) ? – harrymc Oct 09 '18 at 15:17
  • you **might** be able to find an answer [here](https://social.technet.microsoft.com/Forums/windows/en-US/8a9b5aa7-fe33-4e6d-b39b-8ac80a21fdc2/disable-monitor-off-detection-how) (they are trying to turn off what you are trying to turn on) – Albin Oct 09 '18 at 15:25
  • @harrymc DP to HDMI (adapter). Albin: Thanks, I'll give it a read. – stiq Oct 09 '18 at 15:54
  • If you could use DP exclusively, this might solve the problem. – harrymc Oct 09 '18 at 16:27
  • @harrymc I only have HDMI in on the monitor. How does DP work differently than HDMI in this case? – stiq Oct 09 '18 at 17:06
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    The DP detects monitor power-off as device removed, HDMI dosn't. See [my answer](https://superuser.com/a/631691/8672). – harrymc Oct 09 '18 at 17:09
  • @harrymc Thanks, DisplayPort between PC and projector would have disabled it at shutdown, but the projector is HDMI in only, so this is not possible, correct? – stiq Oct 09 '18 at 17:55
  • Would 3rd party software for display configuration profiles be a suitable solution for you? I found [Monitor Profile Switcher](https://sourceforge.net/projects/monitorswitcher/) on SourceForge. It's not entirely automatic, but it would save a few clicks reconfiguring your displays. – Blaelph Oct 09 '18 at 20:54
  • @Blaelph That's the best secondary solution so far, as the issue seems unsolvable. – stiq Oct 10 '18 at 08:30

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