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All replies
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Helpful answers
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Dec 23, 2014 9:16 AM in response to sramabadranby brenden dv,Hi sramabadran,
I'm sorry to hear you are having issues with the video out via DisplayPort on your iMac. If you continue to have detection issues after your Mac wakes from sleep, you may find the troubleshooting steps outlined in the following article helpful:
Apple computers: Troubleshooting issues with video on internal or external displays - Apple Support
You may also want to try testing it by setting only the displays (not the machine) to sleep, and see if the issue persists:
OS X: Saving energy with Sleep - Apple Support
Regards,
- Brenden
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Dec 24, 2014 3:58 AM in response to brenden dvby sramabadran,Hi Brendan,
I have gone thru the steps in the troubleshooting guide.
As described above, the monitor works perfectly with my late 2013 Macbook Pro (Retina) 15".
When the display is put to sleep, and the Asus monitor goes into Standby mode, the iMac is not sending any signal to the device when the display is rewoken. Making the display re-scan for a signal is not sufficient. I have to turn the display off and on, for the iMac to detect it again.
I tried calling Apple and have opened a ticket as well, the the support line keeps hanging up on me when they hear the problem. I guess its too complicated for them to deal with during this holiday season, and they would rather deal with a simple return. ;-P
Not sure what next steps to follow. Has no one else opened a similar ticket. I have found other reports of this problem on various forums.
Shiva
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Feb 17, 2015 1:16 AM in response to sramabadranby theflinston,I do have the same problem, and I still without a solution!
Is very annoying, be necessary to turn off and on the screen each time that I look the screen....
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May 12, 2015 9:20 AM in response to sramabadranby Christopher Appelt,I have the same problem. It's very sporadic and happens unpredictably. The simplest solution for me is to unplug the second monitor and immediately plug it back in. Kind of a pain. I used to have the same problem on another iMac running snow leopard. Using the Display preference, I could tell the computer to identify the monitors (i.e., 1 & 2 show up on each display respectively) and the second monitor would wake up again. Mavericks seems to have lost this feature.
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Oct 6, 2015 9:06 AM in response to sramabadranby Dj Twelvizm,I also have this problem. I have a brand new 2013 Mac Pro that I bought to replace my old Mac Pro 3,1. I'm using the same ASUS 27" 4K monitor, and used it with both machines. On the old MP 3,1, it worked without issue. On the new 2013 MP the screen does not turn on after Energy Saver has turned off the display. This problem doesn't happen when I use an HDMI cable, but as that is limited to 4K at 30htz, it's not desirable, I want the 4K at 60htz that DisplayPort 1.2 provides.
