DaemoNZ
Level 1 (5 points)

Q: External monitor no longer wakes from sleep (10.11.2 update)

I have an external LG LED-LCD panel connected to my Mac Pro 2013 via HDMI.

 

No problems with display sleep at all before... but since updating to 10.11.2, it just does not wake from sleep and I have to force a reboot. I have since turned display sleep options off and I now use a password-protected screensaver instead (for security), and just switch my monitor off with the power button.

 

I had this problem also with Beta 2 and Beta 5 of 10.11.2. Both times I reverted back to 10.11.1 from Time Machine, hoping it would be fixed in the final release.

 

Before anyone says it, the following link is not welcome... I didn't come down in the last shower: If your Mac doesn't sleep or wake when expected - Apple Support

 

It's definitely something that has changed in El Capitan 10.11.2. I now have a $10,000+ beast of a computer that can't put its own display to sleep

Mac Pro, OS X El Capitan (10.11.2), Late 2013 model

Posted on Dec 10, 2015 7:27 PM

by juulonline,Solvedanswer
juulonline juulonline
Level 1 (10 points)
A:

I installed 10.11.3 beta 2 (it's in public beta now) last Sunday, and I have not had any issues after that.

 

I have a an Apple Mini (mid 2011) and a Phillips TV connected via std. HDMI.

 

I'll let you know if the problem re-emerges.

 

But it seems that 10.11.3 solves the issue. The beta seems stable, but I only use it as a Media Center...


 

Posted on Jan 14, 2016 12:45 PM

Close
DaemoNZ

Q: External monitor no longer wakes from sleep (10.11.2 update)

  • All replies
  • Helpful answers

Page 1 of 6 last Next

  • by Weweuyyhgh,

    Weweuyyhgh Weweuyyhgh Dec 11, 2015 12:25 PM in response to DaemoNZ
    Level 1 (5 points)
    Dec 11, 2015 12:25 PM in response to DaemoNZ

    Same exact issue with my mac pro and panasonic plasma hooked up via hdmi. Worked fine before update. Now, if I turn off the monitor, I have to restart the computer to get the monitor to display a image once it's turned back on.

  • by DaemoNZ,

    DaemoNZ DaemoNZ Dec 11, 2015 1:22 PM in response to Weweuyyhgh
    Level 1 (5 points)
    Dec 11, 2015 1:22 PM in response to Weweuyyhgh

    Yes I discovered the same thing last night... that turning off my monitor, it won't turn back on. Once again, I had to force a reboot. Quite frustrating, because now I have to just leave the monitor on 24/7 with the darkest screensaver I can find.

     

    Wondering what the next step should be to log this a bug with Apple. Historically Apple neither confirm nor denies anything so a part of me thinks I'd be wasting my time. I'll dig around and see if I can find more information on the process that deals with display sleep.

     

    EDIT: I am logging the bug via the developer portal, and I also logged the bug here: http://www.apple.com/feedback/macosx.html

  • by anerr,

    anerr anerr Dec 11, 2015 4:44 PM in response to DaemoNZ
    Level 1 (0 points)
    Dec 11, 2015 4:44 PM in response to DaemoNZ

    Same problem with Mac Mini mid-2011 amd radeon hd 6630M 256 MB

    HDMI monitor does not wake after monitor shut off or goes into sleep mode.

    Very annoying and no workaround found - must reboot.

  • by dondyb,

    dondyb dondyb Dec 12, 2015 1:05 AM in response to DaemoNZ
    Level 1 (0 points)
    Dec 12, 2015 1:05 AM in response to DaemoNZ

    Yes, Same issue with MBP RD Mid 2015 with LG UltraWide 34UC97 over mini display port. Have to put out and put in the mini display port to get signal again after sleep.

  • by PrimeNumber,

    PrimeNumber PrimeNumber Dec 12, 2015 3:06 PM in response to DaemoNZ
    Level 1 (0 points)
    Dec 12, 2015 3:06 PM in response to DaemoNZ

    I have the same problem with my 27" iMac Retina. It started happening immediately after I upgraded to 10.11.2.

  • by anerr,

    anerr anerr Dec 12, 2015 5:45 PM in response to dondyb
    Level 1 (0 points)
    Dec 12, 2015 5:45 PM in response to dondyb

    No joy unplugging and re-plugging the HDMI connector.  Only reboot works so far.

  • by PrimeNumber,

    PrimeNumber PrimeNumber Dec 13, 2015 8:14 AM in response to DaemoNZ
    Level 1 (0 points)
    Dec 13, 2015 8:14 AM in response to DaemoNZ

    I have found that if I put it back to sleep for a second time, the external monitor will be recognized again. In other words, I have to put the system to sleep twice for the second monitor to work again. That at least saves from a reboot, but it is still frustrating.

  • by DaemoNZ,

    DaemoNZ DaemoNZ Dec 14, 2015 6:29 PM in response to DaemoNZ
    Level 1 (5 points)
    Dec 14, 2015 6:29 PM in response to DaemoNZ

    Unplugging and re-plugging in the HDMI cable doesn't work for me, nor does putting my display back to sleep a second time

  • by Minginson58,

    Minginson58 Minginson58 Dec 14, 2015 6:57 PM in response to DaemoNZ
    Level 1 (0 points)
    Dec 14, 2015 6:57 PM in response to DaemoNZ

    Ditto - having same problem after 10.11.2 upgrade w/late 2013 Mac Pro.  My TV not being recognized via HDMI through AVR unless both AVR and TV on during start up.  And if I shut TV -- which I usually do if playing music via Mac Pro then connection is lost.  Which ***** because I use the TV to select/play music via iTunes.  So every time I want to go to another song or album, I need to re-boot met computer, which is pretty ridiculous.

  • by huntdog82,

    huntdog82 huntdog82 Dec 14, 2015 9:22 PM in response to DaemoNZ
    Level 1 (0 points)
    Dec 14, 2015 9:22 PM in response to DaemoNZ

    This works for me... I set up the bottom right (or any) hot-corner to shut down the display. When I have this problem and I suspect that the computer is actually awake and just not activating the monitor, I move the mouse into that corner of the monitor twice (with a two-second pause) and it seems to bring the computer/monitor combination back to life

     

    (I haven't bothered trying to enter my password but you may need to log in blindly in order to get the hot corners to work but its late and I'm too annoyed to do any more testing)

  • by r_dizzle,

    r_dizzle r_dizzle Dec 19, 2015 7:58 PM in response to DaemoNZ
    Level 1 (6 points)
    Dec 19, 2015 7:58 PM in response to DaemoNZ

    I have the exact same issue.  MM-2011 with latest upgrade.  I know the computer is working properly because I can remote in off my macbook and the screen shows up there, but there is no output on the HDMI that goes to my TV.  My MacMini runs a media center which is now unusable

     

    I know it's not the input on my receiver because other devices work, and I've tried multiple HDMI cables that do work on other devices.

     

    Any solutions?  I try a reboot and no joy.  Trying to shutdown overnight.

     

    will eventually try the things here:

    Get help with video issues on external displays connected to your Mac - Apple Support

     

    this has got to be a known bug..ugh!

  • by jtandmiki,

    jtandmiki jtandmiki Dec 20, 2015 9:28 AM in response to DaemoNZ
    Level 1 (0 points)
    Dec 20, 2015 9:28 AM in response to DaemoNZ

    Having exact same issue, i have the Late 2013 Mac Pro, D500 cards, and two LU28D590DS/ZA Samsung 4k displays. I never see the boot screen and have to login blindly to FileVault, but sleep has not been an issue for a while. Now every time the monitors sleep, I have to reboot.... not so much a fan of this... I reported the bug to apple too so we will see if they fix it. Definitely started with 10.11.2

     

    I can remote desktop in and use the machine no problem, so I know it is awake, just refuses to display to the connected monitors.

     

    Thanks to everyone who posted here, I was at least received to see that it was not just me and some peculiar issue with my setup.

  • by Minginson58,

    Minginson58 Minginson58 Dec 20, 2015 9:47 AM in response to DaemoNZ
    Level 1 (0 points)
    Dec 20, 2015 9:47 AM in response to DaemoNZ

    FYI - as more people seem to be joining this post: I have been corresponding with a Apple Support Sr. Advisor last week about the issue and directed him to this thread.

     

    His response from past Friday, Dec 18: "Engineering and I have been emailing back and forth about this issue. I am glad you reached out. Can you provide me the specific make and model of the television? And if you don’t mind can you please let me know how it behaves in both Safe Boot (https://support.apple.com/en-us/HT201262) and Recovery (https://support.apple.com/en-us/HT201314)? Just trying to isolate as much as possible for engineering."

     

    I did both as instructed.  Discovered in Safe Boot that I lost Video HDMI connection immediately after start-up before log-in.  In Recovery I reloaded OS X from internet (v. 10.11.2) and still have same issue.

     

    BTW - for what it's worth I also have a late 2013 Mac Pro and a 2011 Panasonic TV; both models/brands have been mentioned in this thread.

     

    So it's a known issue that seems to have just popped up in 10.11.2 for at least several of us.  I'll post if any resolution.

  • by jtandmiki,

    jtandmiki jtandmiki Dec 20, 2015 9:52 AM in response to jtandmiki
    Level 1 (0 points)
    Dec 20, 2015 9:52 AM in response to jtandmiki

    OK... a little further. If I let the power manager put the displays to sleep after however many minutes-hours, they will not wake up. If I manually put the machine to sleep (from apple menu), then they wake up no problem. PLUS, if the power manager puts the machine to sleep, and the displays refuse to wake, if I remote desktop in and force the machine to sleep, when it wakes again the displays power up no problem.

     

    ???????????

Page 1 of 6 last Next