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How can the primary monitor on Windows (starting with 7) be turned on/off?

  • WM_SYSCOMMAND/SC_MONITORPOWER is of no value due to power management if password activated and other negative effects - just try nircmd with with 'password required on display activation' option turned on in Energy Settings;
  • SetVCPFeature w. 0xD6 fails on laptops due to I2C error;
  • ChangeDisplaySettings(Ex) does not produce any reasonable results;
  • SetDisplayConfig fails for primary display ( i.e., position 0/0 ). Any ideas?
V.J.
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  • Related question: [Programmatically changing the “presentation display mode”](http://stackoverflow.com/questions/16790287/programmatically-changing-the-presentation-display-mode) – MicroVirus Aug 28 '15 at 08:24

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