Brotherseamus

Q: Mac mini 2014 won't wake monitor via HDMI

Hello! I just purchased a brand new Mac mini (Late 2014), 2.6 GHz Intel Core i5 with Intel Iris 1536 MB, running Yosemite 10.10. It's connected to an Acer K242HL monitor via HDMI.

 

The monitor connection works correctly (I'm typing this on it now), until I attempt to wake the monitor from sleep. The Mac itself clearly wakes when I click the mouse (the white light stops blinking and stays solid), but the monitor does not respond. I have to power off/on the monitor to get it to wake up.

 

I have previously used the monitor with a MacBook Pro (via HDMI) in clamshell mode and had no problems with it waking up straight away, so I'm assuming the problem lies with the Mac mini.

 

Can anyone offer any advice about this? It's very annoying not being able to quickly wake up the display when I need to use the Mac.

 

Thanks!

Mac mini, OS X Yosemite (10.10)

Posted on Oct 25, 2014 3:35 AM

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Q: Mac mini 2014 won't wake monitor via HDMI

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  • by mmp1964,

    mmp1964 mmp1964 Nov 30, 2015 6:14 AM in response to Irvin Lustig
    Level 1 (8 points)
    Photos for Mac
    Nov 30, 2015 6:14 AM in response to Irvin Lustig

    OK - tried the HDMI-DVI cable again (Amazon Basics) and the first time it came out of sleep, the colors were way off.  I made sure the connection on the monitor was secure and locked it down - and have not had the color problem again - and have had no problems waking from sleep since.  Have probably tested about 6-7 times, including overnight.

     

    I also seemed to have fixed the WiFi not connecting after sleep issue, but I guess that is for another thread.

  • by Irvin Lustig,

    Irvin Lustig Irvin Lustig Dec 1, 2015 4:43 PM in response to Irvin Lustig
    Level 1 (10 points)
    Dec 1, 2015 4:43 PM in response to Irvin Lustig

    I'm now convinced that my problem is with the Acer monitor.  I tried the MacMini Late 2014 with a Pansonic TV, and it wakes up fine from sleep.  I then hooked up my Acer monitor to a Windows laptop with HDMI, and the Acer monitor does NOT wake up from sleep with the Windows laptop.

     

    So it seems there isn't much I can do except get an HDMI->DVI cable to use with the  monitor, or just get used to power cycling the monitor each time I wake the Mac up from sleep. 

  • by Richard Groff2,

    Richard Groff2 Richard Groff2 Dec 19, 2015 6:38 AM in response to Brotherseamus
    Level 1 (19 points)
    Dec 19, 2015 6:38 AM in response to Brotherseamus

    Just got the latest El Capitan update. Didn't fix the problem.

  • by mmp1964,

    mmp1964 mmp1964 Dec 19, 2015 6:57 AM in response to Richard Groff2
    Level 1 (8 points)
    Photos for Mac
    Dec 19, 2015 6:57 AM in response to Richard Groff2

    Did you try using an HDMI to DVI cable?

  • by Irvin Lustig,

    Irvin Lustig Irvin Lustig Dec 24, 2015 3:35 PM in response to mmp1964
    Level 1 (10 points)
    Dec 24, 2015 3:35 PM in response to mmp1964

    I have the HDMI to DVI cable now with my Mac Mini and ACER monitor.  Some times when I wake the Mac Mini up, I get the screen with the login prompts.  Other times, I get a black screen, but I can type my password and log in.  I'm not sure why it works some times and doesn't work other times.

  • by mmp1964,

    mmp1964 mmp1964 Dec 24, 2015 4:37 PM in response to Irvin Lustig
    Level 1 (8 points)
    Photos for Mac
    Dec 24, 2015 4:37 PM in response to Irvin Lustig

    The only other thing I can think to share is - under "Energy Save" - the only box I have checked is "Put hard disks to sleep when possible."

  • by TanLMac,

    TanLMac TanLMac Dec 28, 2015 6:30 PM in response to mmp1964
    Level 1 (0 points)
    Dec 28, 2015 6:30 PM in response to mmp1964

    We were having the same problem - Samsung monitor would not wake up from sleep with a brand new Mac Mini connected by an HDMI and DVI adapter. 

     

    We tightened up the connection and it worked 2/3 times (it hadn't been working at all before).  We set it to not "fall asleep".  We will see what happens.

     

    Thank you all for keeping up with this post so we could benefit from all the troubleshooting you've done!

  • by nspacek,

    nspacek nspacek Jan 6, 2016 6:03 AM in response to TanLMac
    Level 1 (0 points)
    Jan 6, 2016 6:03 AM in response to TanLMac

    Garbage. We were having the same issue over a year ago and I hoped they had fixed it by now. Our new Mac Mini has this same HDMI issue as the previous one, and after it intermittently working and being able to wake from sleep it is today not waking at all.

  • by rtabernero,

    rtabernero rtabernero Jan 12, 2016 11:10 AM in response to Brotherseamus
    Level 1 (0 points)
    Jan 12, 2016 11:10 AM in response to Brotherseamus

    Hello,

     

    same problem here. Mac Mini (latest 2014, El Capitan 10.11.2) randomly doesn't wake up external HDMI monitor (BENQ). Besides, when it happens, my monitor power button doesn't even work, so I have to power cycle my monitor for it to work.

     

    It's annoying and Apple Support should be release some kind of patch to fix it. (I really hope).

     

    BR,

  • by er1c15,

    er1c15 er1c15 Jan 20, 2016 8:42 AM in response to rtabernero
    Level 1 (20 points)
    Jan 20, 2016 8:42 AM in response to rtabernero

    This issue was resolved for me with the model I bought on January 31, 2015. I was having the same problems as mentioned here, so I returned it, and re-purchased the computer once the next OS X update was released. I have not had any problems since.

     

    I will reiterate that this may be model specific. However, there was an OS X update released YESTERDAY, which may have resolved this problem, for those still experiencing it. I'll be interested to hear if it does.

     

    Best of luck!

  • by rtabernero,

    rtabernero rtabernero Jan 20, 2016 10:35 AM in response to Brotherseamus
    Level 1 (0 points)
    Jan 20, 2016 10:35 AM in response to Brotherseamus

    Hi,

     

    actually, with today update (10.11.3), I'm still facing the same issue.

  • by Richard Groff2,

    Richard Groff2 Richard Groff2 Jan 29, 2016 5:11 AM in response to mmp1964
    Level 1 (19 points)
    Jan 29, 2016 5:11 AM in response to mmp1964

    Problem solved! (For about 24 hours now, at least.) Got a DVI cable and used the HDMI to DVI adapter. At first I had the opposite problem: About a minute after the Mac mini went to sleep, it would wake up again. Eventually the screensaver would come on until it went to sleep again, then a minute later it came back on. I clicked on "Prevent computer from sleeping automatically when the display is off" in the Energy Saver Preference and now it's functioning the way all my Macs always used to.

  • by AustinBike,

    AustinBike AustinBike Jan 29, 2016 5:47 AM in response to Richard Groff2
    Level 1 (4 points)
    Servers Enterprise
    Jan 29, 2016 5:47 AM in response to Richard Groff2

    I am finding that every time Apple does an update, they break this.

     

    Mavericks broke this and eventually a follow on patch fixed it.

     

    Then Yosemite broke it and a follow on patch fixed it.

     

    Now El Capitan breaks it again.

     

    When I come out of sleep mode, one monitor gets the "pinkeye" treatment:

     

    IMG_4364.jpg

  • by EngPast,

    EngPast EngPast Mar 19, 2016 1:07 AM in response to Brotherseamus
    Level 1 (0 points)
    Mar 19, 2016 1:07 AM in response to Brotherseamus

    Yes, my tv is a Samsung 32" and I don´t conect in on. I belive that is my Mac (2014), because I off the Mac Mini and I on, too. This is a error in Mac Mini. Ok.

  • by TheMactrix,

    TheMactrix TheMactrix Jun 15, 2016 7:17 AM in response to Brotherseamus
    Level 1 (9 points)
    Jun 15, 2016 7:17 AM in response to Brotherseamus

    For all of you who are struggling with this.... it *****!  I wish Apple would have a fix or something...but it seems it is probably hardware related (endemic to the way the hardware is designed) rather than something that can be fixed by a software upgrade.

     

    I have found a way to solve this problem...

     

    My setup is a 2014 Mac Mini, a Vizio 55 inch 4K monitor (no tuner).  I find that the only way that the monitor can wake up is when I reboot.  If the computer goes to sleep...it does not wake up.  I found a person's post here...with power management settings and that helped some... but that is not the nature of my "fix".

    I don't want the computer to time out and sleep...or screen save...or whatever.  I turned off the sleep settings on the Mac Mini.

     

    The Solution:

    I needed a way to constantly (a relative term) stimulate the display.  My roommate does a lot of telework... via VPN, remote sessions, etc...and many of those systems will time out if there is no mouse movement or keyboard activity.  If you get up to use the restroom, when you come back, your session is disconnected.  They make something called the "Jiggler".  It is a USB dongle... who's only function is to... every so often.... (10 seconds?) move the mouse by a pixel or two.  This does not require you to move the mouse constantly by hand... and because it only 'jiggles' it by a pixel or two... it does not cause problems.  The 'jiggling' is totally transparent.

     

    I purchased one of these dongles...and because I have a external powered 28 port USB hub associated with my Mac Mini (Don't hate... it is truly awesome!), I had plenty of room.

     

    My only draw back is that I have to turn the monitor off when I walk away (via the remote control) ... and don't plan on being there for a while as the way I am solving the problem obviates the whole display sleeping functionality and I don't want burn in on my awesome monitor!  This is something I can do and most certainly live with.  The Jiggler jiggles... and the display never sleeps and I am happy.  Problem solved.

     

    The Jiggler is the "WiebeTech Mouse Jiggler MJ-1 by CRU Inc. and (SC)Amazon.com has it for $17,99.  A small price to pay

     

    So, in a nutshell... things are good... and I am enjoying my 55" LED 4K monitor!

     

    Good luck ;-)

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