Mac mini 2014 won't wake monitor via HDMI

I have the same problem with an Acer S276HL monitor connected by HDMI. If I put my late 2014 mac mini to sleep, it does so and the monitor looses signal and also goes to sleep. Then, when I wake the mac by typing a key, the power indicator light goes constant (indicating it has woken up) but the monitor does not come out of sleep. The only way to get the monitor to start again is to turn it off and back on again.

I suspect the mac mini is simply not sending the wake signal to the monitor.

My windows laptop has no problem in waking the monitor.

I 'm having the same problem with my ViewSonic TD2220...

so annoying.. i even have to turn off the machine and restart sometimes..

I'm having the same issue (2014 i7 3GHz, Apple HDMI cables). To be honest, I'm not sure if power cycling my monitor, receiver, or plugging in a USB mouse made it wake up eventually, but after about a minute it did. My old Mac had DVI to HDMI with the same monitor with no issues at all. I'll call Apple to let them know, especially if tons of other people are having the same problem.

Similar issue, but using a TV via HDMI rather than a monitor - so waking the display seems to be ok, but often I lose the HDMI audio device as an output option. There is clearly something buggy with the HDMI support in the new Mac Mini's and/or Yosemite.

I've been having audio issues as well, sometimes I will lose a channel or two, but have recently seen complete loss of HDMI as an audio option. I have no idea if the audio and sleep issues are related at all, so I didn't mention it before (although both using HDMI is rather suspicious).

I'm using an LED TV as a monitor as well, routed through an AV receiver. I really don't think that the receiver is the issue, as everything else that had been or is using the receiver through HDMI up until the Mac Mini has had no issues at all.

HHave exactly same problems using mini display port on monitor and thunderbolt on Mac seems to be ok... Or set monitor not to go to sleep and use screen saver instead... Dell29" ultra wide....hardware ok as I used bootcamp to install windows no issues there. Note from other posts it's not just 2014 Macmin but all mac mini,s Apple please look for salution

Ditto on the issue with the audio being lost on the HDMI monitor. I recently did a full reboot and it currently works ok, but I noticed the other day that all audio was coming out of the Mini and the "HDMI" audio type was missing from the sound options.

Hi Sorry me again, I know the hdmi issue is a pain, but just tried an experiment yes in windows via boot camp but if you have a display port on monitor your better of using that since there is a performance increase and it solves the sleep wake issue,not the best solution since not everyone has a monitor with a display port...Apple you still need to address this problem....

There are now several posts on the mac mini not just the 2014 model but the 2012 model, from wich there seems a problem with hdmi port, although others have tried workarounds some successful for a WHILE others not so it is up to apple to come up with a proper fix for this. Don't get your hopes up in the near future as I just installed the beta 10.10.1 and its still just as bad. all I can sujest is where possible don't use hdmi but use thunderbolt port to mini display port or with a dvi adapter I know more expence but that works fine for me with no hick upps

Chris

having the same distorted display issues using two viewsonic monitors. I'm using thundetbolt to dvi for both monitor connections

I 'm having the same problem with my Asus mx279h.

Initially I had similar problems with my Mac Mini late 2014 which runs 24/7 and a Panasonic TV but once I changed my energy saver settings to the following I've had no more problems

HTH

El Morche, I'm now with your method. Unchecked the "Prevent computer from sleeping automatically when the display is off". I'll come back with the update later on.

Mine is MM (L2014) Mac OS X 10.10Intel HD Graphics 5000 1536 MB

Intel HD Graphics 5000 1536 MB

Attached to G237HL Display (Acer) via HDMI

🙂

I have a new mini attached to a sony tv via HDMI. I have the same issue. I found that if the tv is turned on and set to the hdmi display setting before waking the computer it will recognize the display. If there is no TV set to the computer it won't. A solution but shouldn't have to do it that way.

I found an interesting way in making my 2014 mac mini wake up...essentially button smashing the keyboard until the screen comes back..lol, see video:

https://vid.me/Mukl