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Screensaver / Display sleep not waking up with Mountain Lion Server

Message #1 - Posted 2012/09/14 - Paul Sture

On Fri, 03 Aug 2012 11:04:59 +0000, Lewis wrote:

In message <CC40607C.51B19%welshgas@virginmedia.com>

Didn't matter if the Screensaver was On or Off the Display Sleep function Schedule would not work, only using a Hot Corner on the screen would put the Display to sleep. Now having tracked the problem to my Canon MP272 printer/scanner and having updated the Canon software does the Display Screen schedule work as intended under 10.8.

For future reference, Shift-Control-Eject will put the display to sleep immediately.

I am having a problem with the display not coming back to life after screensaving and / or Display sleep.

Is there a magic key combination to wake the screen up?

I have tried changing the screen saver and display sleep settings to "Never" but could not get a response when I switched the monitor on this morning. A power cycle did the trick - Yuk!

I could have done a shutdown via ssh from another system, but didn't have one switched on at the time. Would there be anything I can run (remotely) from the command line which would nudge the screen into life?

This is on Mountain Lion Server.

Paul Sture

--
Paul Sture

Message #2 - Posted 2012/09/14 - Paul Sture

On Fri, 14 Sep 2012 13:16:42 +0200, Paul Sture wrote:

On Fri, 03 Aug 2012 11:04:59 +0000, Lewis wrote:

In message <CC40607C.51B19%welshgas@virginmedia.com>

Didn't matter if the Screensaver was On or Off the Display Sleep function Schedule would not work, only using a Hot Corner on the screen would put the Display to sleep. Now having tracked the problem to my Canon MP272 printer/scanner and having updated the Canon software does the Display Screen schedule work as intended under 10.8.

For future reference, Shift-Control-Eject will put the display to sleep immediately.

I am having a problem with the display not coming back to life after screensaving and / or Display sleep.

Is there a magic key combination to wake the screen up?

I have tried changing the screen saver and display sleep settings to "Never" but could not get a response when I switched the monitor on this morning. A power cycle did the trick - Yuk!

I could have done a shutdown via ssh from another system, but didn't have one switched on at the time. Would there be anything I can run (remotely) from the command line which would nudge the screen into life?

This is on Mountain Lion Server.

Update: If I pull the monitor cable, the monitor dims slightly and displays a message that there is no cable signal.

Plugging the cable back in brings the screen back. I am now wondering if there's some setting in the monitor itself which is causing this.

It only started happening since I upgraded to Mountain Lion Server though.

Paul Sture

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