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Is there a way to check if display is powered on in linux. I tried xrandr and xset but none of these two give me if any information about monitor power. using xrandr we can identify if the vga cable is connected but not if power is connected. I need this because many of our Lab systems keep lying unused just because some one pulls out the power cable or so.

-- Jatin

Jatin Kumar
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    If display has no power, isn't it the same as vga cable disconnected for xrandr? – CharlesB Jul 18 '11 at 13:30
  • It might be best to migrate this to the relevant stackexchange network website: http://unix.stackexchange.com – tomeduarte Jul 18 '11 at 13:37
  • @CharlesB: It is not the same. Even if the power is off and VGA is connected it shows VGA Connected, i have been playing around with all this for past 2 days but could not figure out a way to detect monitor power off. – Jatin Kumar Jul 19 '11 at 08:36

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