Chip Russell

Q: 10.11.2 Insignia HDMI Monitor problem

My insignia HDMI TV/Monitor which I use for my secondary display has worked perfectly until I upgraded to El Capitan (Betas and now 10.11.2).

 

Setup: TV/Monitor has two HDMI connections. HDMI1 input is from the CableBox to TV. HDMI2 is from the MacPro to the TV.

 

Problem: If I switch the input on the TV/Monitor between the two sources (Cable box on the HDMI input), the MacPro does not recognize/initialize the TV/Monitor.

 

The only solution is to get the MacPro to see the monitor is to make sure the TV/Monitor is set to HDMI2 and restart the MacPro then it works fine. Until I have to switch inputs again of course.

 

UGH

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

Posted on Dec 9, 2015 10:29 AM

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Q: 10.11.2 Insignia HDMI Monitor problem

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  • Helpful answers

  • by lllaass,Apple recommended

    lllaass lllaass Dec 9, 2015 10:51 AM in response to Chip Russell
    Level 10 (187,938 points)
    Desktops
    Dec 9, 2015 10:51 AM in response to Chip Russell
  • by Cody_G,

    Cody_G Cody_G Dec 9, 2015 11:00 AM in response to Chip Russell
    Level 1 (0 points)
    Dec 9, 2015 11:00 AM in response to Chip Russell

    For the record, I'm having the exact same problem with my Mac Pro after upgrading to 10.11.2 (including betas).

     

    This happens to my Asus PB278Q plugged in via DisplayPort -> Mini DisplayPort (MDP). I can switch ports, or simply turn it off and back on and I get the same result in my logs:

     

    I have tried resetting the SMC, I have tried uninstalling software. I have tried disabling power nap. This seems to be a driver issue at this point as it does it in safe mode.

     

    This happens when i turn the display back on:

     

    All Messages

    12/9/15 9:58:04.000 AM kernel[0]: process WindowServer[192] caught causing excessive wakeups. Observed wakeups rate (per sec): 244; Maximum permitted wakeups rate (per sec): 150; Observation period: 300 seconds; Task lifetime number of wakeups: 50367

    12/9/15 9:58:04.016 AM com.apple.xpc.launchd[1]: (com.apple.ReportCrash.Root[701]) Endpoint has been activated through legacy launch(3) APIs. Please switch to XPC or bootstrap_check_in(): com.apple.ReportCrash.DirectoryService

    12/9/15 9:58:05.217 AM SystemUIServer[429]: CGSCopyDisplayInfoDictionary: error requesting display info dictionary (0x3e8)

    12/9/15 9:58:05.325 AM SystemUIServer[429]: CGSCopyDisplayInfoDictionary: error requesting display info dictionary (0x3e8)

    12/9/15 9:58:11.597 AM spindump[640]: Saved wakeups_resource.diag report for WindowServer version ??? (???) to /Library/Logs/DiagnosticReports/WindowServer_2015-12-09-095811_Mercury.wakeups_ resource.diag

     

     

    System.log

    Marker - Dec 9, 2015, 9:57:50 AM

    Dec  9 09:58:02 Mercury kernel[0]: LS(4354): IdentifiedByStackParsing:/Applications/Server.app/Contents/ServerRoot/usr/bin/p ostgres_real

    Dec  9 09:58:04 Mercury kernel[0]: process WindowServer[192] caught causing excessive wakeups. Observed wakeups rate (per sec): 244; Maximum permitted wakeups rate (per sec): 150; Observation period: 300 seconds; Task lifetime number of wakeups: 50367

    Dec  9 09:58:04 Mercury com.apple.xpc.launchd[1] (com.apple.ReportCrash.Root[701]): Endpoint has been activated through legacy launch(3) APIs. Please switch to XPC or bootstrap_check_in(): com.apple.ReportCrash.DirectoryService

    Dec  9 09:58:04 Mercury ReportCrash[701]: Invoking spindump for pid=192 wakeups_rate=244 duration=185 because of excessive wakeups

    Dec  9 09:58:04 Mercury WindowServer[192]: Received display connect changed for display 0x3f003c

    Dec  9 09:58:04 Mercury WindowServer[192]: Found 1 modes for display 0x003f003c [1, 0]

    Dec  9 09:58:04 Mercury WindowServer[192]: Received display connect changed for display 0x1a496f1d

    Dec  9 09:58:04 Mercury WindowServer[192]: Found 1 modes for display 0x1a496f1d [1, 0]

    Dec  9 09:58:04 Mercury WindowServer[192]: Display 0x1a496f1d changed state to offline

    Dec  9 09:58:04 Mercury WindowServer[192]: No display devices are on-line. Switching to virtual display mode

    Dec  9 09:58:04 Mercury WindowServer[192]: Received display connect changed for display 0x3f003e

    Dec  9 09:58:04 Mercury WindowServer[192]: Found 1 modes for display 0x003f003e [1, 0]

    Dec  9 09:58:04 Mercury WindowServer[192]: Received display connect changed for display 0x3f003f

    Dec  9 09:58:04 Mercury WindowServer[192]: Found 1 modes for display 0x003f003f [1, 0]

    Dec  9 09:58:04 Mercury WindowServer[192]: Received display connect changed for display 0x3f0040

    Dec  9 09:58:04 Mercury WindowServer[192]: Found 1 modes for display 0x003f0040 [1, 0]

    Dec  9 09:58:04 Mercury WindowServer[192]: Received display connect changed for display 0x3f0041

    Dec  9 09:58:04 Mercury WindowServer[192]: Found 1 modes for display 0x003f0041 [1, 0]

    Dec  9 09:58:04 Mercury WindowServer[192]: Display 0x41dc9d06: GL mask 0x40; bounds (0, 0)[1280 x 1024], 2 modes available

      off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 6, Rotation 0

      UUID 0xffffffffffffffffffffffffffffffff

    Dec  9 09:58:04 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x01021c01, GL mask 0x0000007f, accelerator 0x00004f6b, unit 0, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:04 Mercury WindowServer[192]: Display 0x41dc9d05: GL mask 0x20; bounds (0, 0)[1280 x 1024], 2 modes available

      off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 5, Rotation 0

      UUID 0xffffffffffffffffffffffffffffffff

    Dec  9 09:58:04 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x01021c01, GL mask 0x0000007f, accelerator 0x00004f6b, unit 0, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:04 Mercury WindowServer[192]: Display 0x41dc9d04: GL mask 0x10; bounds (0, 0)[1280 x 1024], 2 modes available

      off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 4, Rotation 0

      UUID 0xffffffffffffffffffffffffffffffff

    Dec  9 09:58:04 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x01021c01, GL mask 0x0000007f, accelerator 0x00004f6b, unit 0, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:04 Mercury WindowServer[192]: Display 0x41dc9d03: GL mask 0x8; bounds (0, 0)[1280 x 1024], 2 modes available

      off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 3, Rotation 0

      UUID 0xffffffffffffffffffffffffffffffff

    Dec  9 09:58:04 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x01021c01, GL mask 0x0000007f, accelerator 0x00004f6b, unit 0, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:04 Mercury WindowServer[192]: Display 0x41dc9d02: GL mask 0x4; bounds (0, 0)[1280 x 1024], 2 modes available

      off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 2, Rotation 0

      UUID 0xffffffffffffffffffffffffffffffff

    Dec  9 09:58:04 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x01021c01, GL mask 0x0000007f, accelerator 0x00004f6b, unit 0, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:04 Mercury WindowServer[192]: Display 0x41dc9d07: GL mask 0x80; bounds (0, 0)[1280 x 1024], 2 modes available

      off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 7, Rotation 0

      UUID 0xffffffffffffffffffffffffffffffff

    Dec  9 09:58:04 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x02021c01, GL mask 0x00000080, accelerator 0x0000272b, unit 7, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:04 Mercury WindowServer[192]: Display 0x41dc9d00: GL mask 0x1; bounds (0, 0)[1280 x 1024], 2 modes available

      off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 0, Rotation 0

      UUID 0xffffffffffffffffffffffffffffffff

    Dec  9 09:58:04 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x01021c01, GL mask 0x0000007f, accelerator 0x00004f6b, unit 0, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:04 Mercury WindowServer[192]: Display 0x41dc9d01: GL mask 0x2; bounds (0, 0)[2560 x 1440], 35 modes available

      Main, Active, on-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 1, Rotation 0

      UUID 0xb2aa0162aba180fd866d412b2e02539f

    Dec  9 09:58:04 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x01021c01, GL mask 0x0000007f, accelerator 0x00004f6b, unit 0, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:04 Mercury WindowServer[192]: CGError post_notification(const CGSNotificationType, void *const, const size_t, const bool, const CGSRealTimeDelta, const int, const CGSConnectionID *const, const pid_t): Timed out 0.250 second wait for reply from "iStat Menus Status" for synchronous notification type 100 (kCGSDisplayWillReconfigure) (CID 0x10c03, PID 478)

    Dec  9 09:58:05 Mercury WindowServer[192]: CGError post_notification(const CGSNotificationType, void *const, const size_t, const bool, const CGSRealTimeDelta, const int, const CGSConnectionID *const, const pid_t): Timed out 0.250 second wait for reply from "Console" for synchronous notification type 109 (<unknown>) (CID 0x15707, PID 647)

    Dec  9 09:58:05 Mercury WindowServer[192]: CGError post_notification(const CGSNotificationType, void *const, const size_t, const bool, const CGSRealTimeDelta, const int, const CGSConnectionID *const, const pid_t): Timed out 0.250 second wait for reply from "Little Snitch Agent" for synchronous notification type 109 (<unknown>) (CID 0xe003, PID 432)

    Dec  9 09:58:05 Mercury WindowServer[192]: CGXDisplaysDidReconfigure: Display added

    Dec  9 09:58:05 Mercury WindowServer[192]: CGXDisplaysDidReconfigure: Display removed

    Dec  9 09:58:05 Mercury WindowServer[192]: Display 0x41dc9d01: GL mask 0x2; bounds (0, 0)[2560 x 1440], 35 modes available

      Main, Active, on-line, enabled, built-in, OpenGL-accel, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 1, Rotation 0

      UUID 0xb2aa0162aba180fd866d412b2e02539f

    Dec  9 09:58:05 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x01021c01, GL mask 0x0000007f, accelerator 0x00004f6b, unit 0, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:05 Mercury WindowServer[192]: Display 0x41dc9d06: GL mask 0x40; bounds (3584, 0)[1 x 1], 2 modes available

      off-line, enabled, built-in, OpenGL-accel, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 6, Rotation 0

      UUID 0xffffffffffffffffffffffffffffffff

    Dec  9 09:58:05 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x01021c01, GL mask 0x0000007f, accelerator 0x00004f6b, unit 0, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:05 Mercury WindowServer[192]: Display 0x41dc9d05: GL mask 0x20; bounds (3585, 0)[1 x 1], 2 modes available

      off-line, enabled, built-in, OpenGL-accel, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 5, Rotation 0

      UUID 0xffffffffffffffffffffffffffffffff

    Dec  9 09:58:05 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x01021c01, GL mask 0x0000007f, accelerator 0x00004f6b, unit 0, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:05 Mercury WindowServer[192]: Display 0x41dc9d04: GL mask 0x10; bounds (3586, 0)[1 x 1], 2 modes available

      off-line, enabled, built-in, OpenGL-accel, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 4, Rotation 0

      UUID 0xffffffffffffffffffffffffffffffff

    Dec  9 09:58:05 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x01021c01, GL mask 0x0000007f, accelerator 0x00004f6b, unit 0, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:05 Mercury WindowServer[192]: Display 0x41dc9d03: GL mask 0x8; bounds (3587, 0)[1 x 1], 2 modes available

      off-line, enabled, built-in, OpenGL-accel, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 3, Rotation 0

      UUID 0xffffffffffffffffffffffffffffffff

    Dec  9 09:58:05 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x01021c01, GL mask 0x0000007f, accelerator 0x00004f6b, unit 0, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:05 Mercury WindowServer[192]: Display 0x41dc9d02: GL mask 0x4; bounds (3588, 0)[1 x 1], 2 modes available

      off-line, enabled, built-in, OpenGL-accel, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 2, Rotation 0

      UUID 0xffffffffffffffffffffffffffffffff

    Dec  9 09:58:05 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x01021c01, GL mask 0x0000007f, accelerator 0x00004f6b, unit 0, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:05 Mercury WindowServer[192]: Display 0x41dc9d07: GL mask 0x80; bounds (3589, 0)[1 x 1], 2 modes available

      off-line, enabled, built-in, OpenGL-accel, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 7, Rotation 0

      UUID 0xffffffffffffffffffffffffffffffff

    Dec  9 09:58:05 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x02021c01, GL mask 0x00000080, accelerator 0x0000272b, unit 7, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:05 Mercury WindowServer[192]: Display 0x41dc9d00: GL mask 0x1; bounds (3590, 0)[1 x 1], 2 modes available

      off-line, enabled, built-in, OpenGL-accel, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 0, Rotation 0

      UUID 0xffffffffffffffffffffffffffffffff

    Dec  9 09:58:05 Mercury WindowServer[192]: GLCompositor: GL renderer id 0x01021c01, GL mask 0x0000007f, accelerator 0x00004f6b, unit 0, caps QEX|MIPMAP, vram 3072 MB

      texture max 16384, viewport max {16384, 16384}, extensions NPOT|GLSL|FLOAT

    Dec  9 09:58:05 Mercury com.apple.AmbientDisplayAgent[237]: AMBD: setOverridesFound failed to find displayID 0x41dc9d01's context on context list

    Dec  9 09:58:05 Mercury com.apple.AmbientDisplayAgent[237]: AMBD: copyVCGTtoLUTtable() synth'ing linear LUT

    Dec  9 09:58:05 Mercury SystemUIServer[429]: CGSCopyDisplayInfoDictionary: error requesting display info dictionary (0x3e8)

    Dec  9 09:58:07 --- last message repeated 1 time ---

    Dec  9 09:58:07 Mercury WindowServer[192]: **DMPROXY** (2) Found `/System/Library/CoreServices/DMProxy'. Run with arg = -discovery

    Dec  9 09:58:07 Mercury WindowServer[192]: **DMPROXY** (2) Found `/System/Library/CoreServices/DMProxy'. Run with arg = -AMBDprefs

    Dec  9 09:58:07 Mercury DMProxy[704]: CGSCopyDisplayInfoDictionary: error requesting display info dictionary (0x3e8)

    Dec  9 09:58:07 Mercury WindowServer[192]: CGXSetDisplayColorProfileAndTransfer: Display 0x41dc9d01: Unit 1; ColorProfile { -1045643947 }; TransferFormula (1.000000, 1.000000, 1.000000)

    Dec  9 09:58:07 Mercury DMProxy[705]: ASSERTION FAILED: gALSPlugin != ((void*)0) copyPreferenceForKey line: 274

    Dec  9 09:58:07 Mercury com.apple.AmbientDisplayAgent[237]: AMBD setCompensationState: Turning ON Automatic Adaptation (for displayID 0x41dc9d01)

    Dec  9 09:58:07 Mercury com.apple.AmbientDisplayAgent[237]: AMBD (pid 237) Warning: assert(gALSdataPort) failed in function setupInitialCompensation:437 in file /Library/Caches/com.apple.xbs/Sources/AmbientDisplay/AmbientDisplay-59/Sources/ AmbientDisplayAgent.c

    Dec  9 09:58:11 --- last message repeated 1 time ---

    Dec  9 09:58:11 Mercury spindump[640]: Saved wakeups_resource.diag report for WindowServer version ??? (???) to /Library/Logs/DiagnosticReports/WindowServer_2015-12-09-095811_Mercury.wakeups_ resource.diag

    Dec  9 09:58:12 Mercury kernel[0]: LS(4354): IdentifiedByStackParsing:/mach_kernel

    Dec  9 09:58:42 --- last message repeated 5 times ---

    Dec  9 09:58:42 Mercury kernel[0]: LS(4354): IdentifiedByStackParsing:/Applications/Server.app/Contents/ServerRoot/usr/bin/p ostgres_real

    Dec  9 09:59:12 --- last message repeated 1 time ---

    Dec  9 09:59:12 Mercury kernel[0]: LS(4354): IdentifiedByStackParsing:/mach_kernel

     

    All I can come up with is extracting the AMD drivers from 10.11.1, but that's just a shot in the dark.

  • by Weweuyyhgh,

    Weweuyyhgh Weweuyyhgh Dec 10, 2015 5:11 PM in response to Cody_G
    Level 1 (5 points)
    Dec 10, 2015 5:11 PM in response to Cody_G

    I have the exact same issue with my mac pro and panasonic 65" hooked up via hdmi. Reset SMC etc. Only way to get the monitor to display after it has been powered off is to restart the mac.

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Dec 10, 2015 8:03 PM in response to Chip Russell
    Level 9 (60,692 points)
    Desktops
    Dec 10, 2015 8:03 PM in response to Chip Russell

    The Mac uses the same highly parameterized Driver for every Display. The display resolution is set based on the stored value AND the answer to a query to the display. (this is also how it knows the display's name when you never typed that in.)

     

    The query is sent:

    • at startup

    • at insertion of the Mac-end of a display cable

    • when you click the Option-Detect_Displays button in Displays preferences

    • at wake from sleep          <-- can be used to re-send the query

     

    an important part of this process, especially with all these new multi-input displays that are suddenly available, is that the display has to be 'paying attention' so that it can answer the Mac query with its capabilities and its name.

  • by Weweuyyhgh,Helpful

    Weweuyyhgh Weweuyyhgh Dec 11, 2015 5:54 AM in response to Grant Bennet-Alder
    Level 1 (5 points)
    Dec 11, 2015 5:54 AM in response to Grant Bennet-Alder

    The problem did not exist until after the 10.11.2 update. I now have a computer I can't use unless I restart it after I have turned off the monitor. Keeping the monitor on at all times is not a viable solution. So while your information is interesting, the problem we are having didn't occur until after the update.

  • by ajbrutico,

    ajbrutico ajbrutico Dec 13, 2015 10:29 PM in response to Weweuyyhgh
    Level 1 (4 points)
    Mac OS X
    Dec 13, 2015 10:29 PM in response to Weweuyyhgh

    I can get mine to come on when I unplug the monitor and then plug it back in to the mac pro.

  • by mikehjorleifsson,

    mikehjorleifsson mikehjorleifsson Dec 14, 2015 11:23 AM in response to Chip Russell
    Level 1 (0 points)
    Dec 14, 2015 11:23 AM in response to Chip Russell

    Had the same problem, resetting PRAM/SMC did nada. rebooting did nothing.

    I installed the displaylink usb driver even though i dont have one but it does something to the AMD driver

    so now its working again...

  • by Minginson58,

    Minginson58 Minginson58 Dec 16, 2015 7:44 PM in response to Weweuyyhgh
    Level 1 (0 points)
    Dec 16, 2015 7:44 PM in response to Weweuyyhgh

    Funny, I'm also having exact same problem with a late 2013 Mac Pro and 65" Panasonic TV.  Contacted Apple support 2 days ago and sent my log files over.  Apparently they're still looking into and have not gotten back to me yet.  See on Mac Rumors have already seeded an 10.11.3 update -- I tend not to follow these types of announcements all that closely as have never had this type of problem before ... but seems like this is following pretty quickly on the heels of 10.11.2?

    Hopefully they've found the bug and developed fix?

  • by ajbrutico,

    ajbrutico ajbrutico Dec 17, 2015 5:59 AM in response to Minginson58
    Level 1 (4 points)
    Mac OS X
    Dec 17, 2015 5:59 AM in response to Minginson58

    Does the new beta fix this?

  • by Chip Russell,

    Chip Russell Chip Russell Dec 17, 2015 6:02 AM in response to ajbrutico
    Level 1 (10 points)
    Dec 17, 2015 6:02 AM in response to ajbrutico

    Nor for me. Tested this morning.

  • by coche155,

    coche155 coche155 Dec 18, 2015 3:34 AM in response to Grant Bennet-Alder
    Level 1 (0 points)
    Dec 18, 2015 3:34 AM in response to Grant Bennet-Alder

    I've been having this problem the last few days since an automatic upgrade to 10.11.2.

    I Have not updated to any betas.

     

    I'm on a Mac mini 2011 connected to a 65" Sony television with HDMI. Has been connected this way for a year with no recent hardware changes.

     

    When I turn my TV off and back on the Mac no longer detects the tv unless/until I reboot.

     

    I can connect via screen sharing and see that it's still in 1080p format, but Detect Displays does NOTHING, unplugging and replugging the HDMI cable does NOTHING, and resetting my PRAM hasn't helped. The only thing working is to Screen Share in and reboot the Mini. Not really a viable solution every time I want to turn on my TV.

  • by Lateralus11235,

    Lateralus11235 Lateralus11235 Dec 21, 2015 1:19 PM in response to Chip Russell
    Level 1 (0 points)
    Dec 21, 2015 1:19 PM in response to Chip Russell

    I am having the same problem with my Asus 4k monitors (PB287Q).  Since my upgrade if my computer sleeps I lose all monitor connectivity.  Oddly, my track pad 2 also looses single button click but repetitive reboots fixes this.

     

    The process for me to get my monitors to work is... challenging.  I need to boot up with an HDMI cable after a forced power reset on my Mac Pro.  The display port cables need to be unplugged.  On boot up, I need to log in and then add 1 display port cable.  Then I unplug the HDMI cable, then plug in the other display port cable.

     

    Now with 10.11.2 the moment monitor goes blank (assuming I don't want to just run a power-sucking screensaver) I lose all connectivity.  And I need to start this convoluted process all over again.

  • by jilbert,

    jilbert jilbert Dec 27, 2015 6:11 AM in response to coche155
    Level 1 (5 points)
    Dec 27, 2015 6:11 AM in response to coche155

    I also have this problem with a Mac mini (Mid 2011) with AMD Radeon HD 6630M 256 MB graphics.

     

    Its HDMI is connected to a video processor (DVDO Edge) and then to a Sony TV. Since upgrading to 10.11.2 it will not redisplay once the video processor has been switched off. This setup has been working since I bought the Mac mini, apart from one previous OS update, which I think broke just the sound.

     

    What I've found that works to get the display back:

     

    • Restarting

     

    Things I've tried that do not work:

     

    • Resetting the PRAM.
    • Resetting the SMC.
    • Connecting via Screen Sharing from my iMac, holding down "Alt" in System Preferences > Displays and pressing the "Detect Displays" button that appears.
    • Unplugging the HDMI lead from the back of the Mac mini and plugging it back in (while the video processor is on).