Mac mini 2014 won't wake monitor via HDMI

Same here with the MacMini connected to a Sony LED via Denon AVR. No Picture and no Sound after wake up.

Nov 8, 2014 2:30 AM Re: Mac mini 2014 won't wake monitor via HDMI
Re: Mac mini 2014 won't wake monitor via HDMIin response to El Morche

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

Hi all,

No luck.
Tried smashing the keystroke repeatedly as per matt1888 method, still not working on mine.

The working method is, whem the computer sleep (the CPU LED's deeming), punch a single keystroke will wake up the CPU but "Cable disconnected" still appearing on the screen. (smashing keystroke repeatedly does not working for me even in this stage).

I have to turn off and on the power button on the monitor, and puch a single or soflty repeatedly will waking up the monitor.

🙂 oh dear...

I'm having the same exact problem on an HP2311xi monitor. If I use thunderbolt to VGA I get distorted colors on occasion. If I use the HDMI port, the screen doesn't even wake. Frustrating. I may need to swap this new system for an iMac unless I get a resolution (no pun intended lol) to the issue.

Same issue here.

2014 MacMini connected via HDMI directly to my Sony TV. Have tried a number of HDMI cables which work fine with other devidces, and none fix the issue on the MacMini.

Nothing wakes up the HDMI port, other than removing the cable and then plugging back in.

Seriously inhibits its usefulness as a media device if I have to cable cycle everytime I want to use.

Logged with AppleCare.

Mac Mini 2014, Intel Iris graphics card, same problems.

I had the energy saver settings all turned off and it still occurred. Steps to reproduce:

* Connect Mac Mini to a monitor / TV via HDMI.

* Turn off monitor / TV for an extended period of time, but leave Mac Mini on.

* Return a few hours later and the Mac Mini has issues sending a signal over HDMI.

When the Mac Mini was in this state, I swapped out different HDMI cables and the issue would not correct itself. I would turn the monitor / TV off and unplug then reconnect and the issue would not correct itself. I swapped out a different HDMI AND a different monitor / TV and the issue would still not correct itself.

To me, it seems the Mac Mini's graphics controller runs into a memory leak issue if no external source is present for an extended period of time. Possibly related to HDMI's copy protection (HDCP). Searching for this issue turns up thousands of posts from 2012 Mac Mini owners too which seemed to be corrected by a firmware fix at some point. However, Apple seems to have let this bug slip back in. One of the biggest selling features of the Mac Mini is the HDMI port and its media center capabilities. Seeing as many people are running into this issue, and I personally ran into it within a day of use, you have to wonder what type of QA testing Apple puts its machines through.

Somebody please reply to this thread once the issue is fixed.

Yosemite 10.10.1 released 11/17/2014 should fix this issue:

Addresses an issue that could prevent some Mac mini computers from waking from sleep

10.10.1 did not solve this problem for me. Not very happy.

My Dell monitor still doesn't wake up after the screen goes to sleep but the Mac is stil playing music or something.

Works... I have the new 2014 mini.. second one up with the iris processor. I started the TV up three times and hit the return key each time the mini went to sleep. Each time it promptly awakened. That didn't happen before. I always had to unplug/plug in the hdmi cable.

So.. working on an iris graphics late 2014 mini with Sony Bravia TV via hdmi

It has been hit or miss from my experience after the update. I've got a 2014 i7 3GHz Mac Mini. At first it was doing great, no waking issues, but occasionally I have to still power cycle my receiver and/or TV after either moving the mouse or using the keyboard. Today I've experienced graphical artefacts and screen flashing to black, which previous to this update I hadn't seen.

I Have an HP w2338h and I have the same issue with my new mini not waking the monitor. I have to turn the monitor off and on again to get it to come back. Very frustrating from a former pc owner. Thought Apple was the "be all end all", but thhis is a simple thing that should work.... Oh and this is with the 10.10.1 update installed as well...

Try this as a not too arduous workaround. Go to System Prefs/Security/General. Set the Mac to require a password on wake up "immediately".

Worked for me

I also installed 10.10.1 but the problem remains. Will try JustMeandTheDog's suggestion on requiring password immediately next.

Well, I switched from an HDMI cable to a VGA and that works a LOT better. The display does not come back when I move the mouse, but if I hit a key on the keyboard, the display wakes in 1-2 seconds. That's much better than not waking at all, plus I think the monitor is performing better as well. Go figure... Hope this helps someone else.... Still, I hope this is something Apple will fix soon...