Mac Mini 2011 display sleep problem

I'm having the same problem with my 2011 mini, but it is with the minidisplayport to dual link dvi adapter. If I unplug the adapter and replug it the display comes back.

My Mac mini shows the same issue. After the system goes to sleep, the screen does not turn on when the Mac mini awakes from sleep.

I'm using the Apple Minidisplayport-DualLinkDVI Adapter with a 30" ACD. It might be a coincidence, but the last change I made to my system was the Thunderbolt Update … and since this time my Mac is having this problem. Strange.

I have had no problems with the sleep/wake feature of my mac mini 2011 to my monitor. I do and have learned this from the past with any computer setup: Using an adaptor can diminish signals between hardware. Recommendation if possible...a direct link - one cable!

Scrobz wrote:

When OS X Lion prompts the display sleep, the screen won't come back again. Not even after pushing a key, or clicking the mouse/trackpad.

When OS X went to sleep, all external interfaces get switched OFF, except for "wake on network" if selected.

This indicates, your TB interface may have a "wake up" problem.

As I have no "wake up" problem when a external VGA display is connected to the TB interface.

For that, I think your system may have a problem with the power management.

First try is to follow the steps in the Article behind the link, ending with a SMC reset.

http://support.apple.com/kb/HT3964?viewlocale=de_DE

Lupunus

Not a very useful suggestion. HDMI would be the only direct connection. My monitor is 30" 2560 x 1600. The Mac mini is designed to support this size monitor through Thunderbolt with a dual link dvi adaptor. This is how the computer is marketed. It should work this way.

Tried the SMC reset, now I can wake from sleep, but my fans are continously running on high speed.

Any ideas?

rluciano wrote:

Tried the SMC reset, now I can wake from sleep, but my fans are continously running on high speed.

OK, one step closer to complete success.

Had you open the Mini recently; e.g. to swap RAM?

Lupunus

Scrobz wrote:

in my case its the 'display sleep' functionality that is problematic. When the display goes to sleep, lets say after 10 minutes, it won't come back on. I have to reboot, or let the computer go to sleep and wakeup in order to get the screen back.

OK, misunderstood you.

Depending on the Display you use with the Mini, the display's own "Sleep" settings may be the problem here.

The Mini may eventually not recognize the display went to sleep on its own too, or the display not recognizes the wake up signal if on self indicated sleep.

TV's often use a differnt wake up signal to wake up from power safe.

Disable the own "sleep" or power safe settings of the display, and eventually try a different cable between Mini and Display

Also you may try to wake up the display by hitting the "eject" button for the optical drive (no joke).

Cheers - Lupunus

Scrobz wrote:

Thanks for the tip Lupunus. Currently I am at the office so I can't test it right away.

I'd just looked a bit around here and there and found that this is obviously a common problem, regardless of the used display brand or model.

It seems, that either the "wake up" signal isn't strong enough to wake up the display, there may be conflicts with some installed software; e.g. for HP printers, or the cable have to much resistance what decrease the (eventually on the lower side of the tolerance band sitting) output signal strength.

For example -> https://discussions.apple.com/thread/2182798?start=30&tstart=0

The discussions mostly not reflects the use of a TV as display, so the TV's own sleep settings may affect the situation too.

And, looking back to my own support experiences the cable is in many cases the thing. Aside from the fact that there are standards, e.g for DVI, these standards have enough space for manufacturers of display's, graphic card's and cables to develop "nice" own features or use different pins for different signals; e.g. Belinea used to use a different line (pin) on the VGA interface for DCC signal.

Good luck - Lupunus

Scrobz wrote:

You still think its related to the TV settings?

After circling around the question for a while and having a nice walk in woods, I tend to say: "Eventually, but not for real"

It's allready worth a try to check the TV settings on power save / sleep.

Check the post I've made on the discussion I've linked to in my last post.

I'm pretty sure that's the solution for your problem is there.

Good luck - Lupunus

OK. Try the following. This may not be the answer. But for all those who have the Mac mini plugged into a TV monitor or wateva. You must turn the TV ON FIRST before awaking computer from sleep. This applies to turning the Mac Mini on from shut down too.

This is a consistent solutionfor me. Weird. If only the display is asleep it wakes fine. But if the computer and display are both asleep, the display does not awaken. If the display is on (not asleep) and the computer is woken from sleep all works well.

Woo-hoo

rluciano wrote:

This is a consistent solutionfor me. Weird. If only the display is asleep it wakes fine. But if the computer and display are both asleep, the display does not awaken. If the display is on (not asleep) and the computer is woken from sleep all works well.

Woo-hoo

Very interesting information, especially the first and the second finding.

The third point is clear.

In this case no "wake up" burst have to be interpreted by the displays interface.

Thanks for that!

Lupunus