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User profile for user: Haknat
Haknat Author
User level: Level 1
0 points

External Display No Longer Working (Air & Thunderbolt)

My MacBook Air just decided it no longer wants to work with my external Dell U2711 display via Thunderbolt to DisplayPort cable. Frustrating as this has been working for the past 3 years. Currently running OS X 10.10.2. Have tried PRAM and SMC resets to no avail. Not sure what is going wrong, but looking at the error log it is obviously trying to set it to the wrong resolution "1440 x 900". Previously everything was working great with a resolution of 2560 x 1440. Thoughts?


****Error Log Below****

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: Received display connect changed for display 0x42737c0

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: Found 16 modes for display 0x042737c0 [16, 0]

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: Received display connect changed for display 0x3f003d

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: Found 1 modes for display 0x003f003d [1, 0]

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: Received display connect changed for display 0x3f003e

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: Found 1 modes for display 0x003f003e [1, 0]

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: Display 0x042737c0: GL mask 0x1; bounds (0, 0)[1440 x 900], 16 modes available

Main, Active, on-line, enabled, built-in, boot, OpenGL-accel, Vendor 610, Model 9cdf, S/N 0, Unit 0, Rotation 0

UUID 0x2fa49b462ac314062ce76fce977d6525, ColorSpace { 189789772 }

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: GLCompositor: GL renderer id 0x01024301, GL mask 0x0000000f, accelerator 0x00003ab3, unit 0, caps QEX|MIPMAP, vram 451 MB

texture max 8192, viewport max {8192, 8192}, extensions NPOT|GLSL|FLOAT

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: Display 0x003f003f: GL mask 0x8; bounds (2464, 0)[1 x 1], 2 modes available

off-line, enabled, OpenGL-accel, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 3, Rotation 0

UUID 0xffffffffffffffffffffffffffffffff

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: GLCompositor: GL renderer id 0x01024301, GL mask 0x0000000f, accelerator 0x00003ab3, unit 0, caps QEX|MIPMAP, vram 451 MB

texture max 8192, viewport max {8192, 8192}, extensions NPOT|GLSL|FLOAT

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: Display 0x003f003e: GL mask 0x4; bounds (2465, 0)[1 x 1], 1 modes available

off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 2, Rotation 0

UUID 0xffffffffffffffffffffffffffffffff

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: Display 0x003f003d: GL mask 0x2; bounds (2466, 0)[1 x 1], 1 modes available

off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 1, Rotation 0

UUID 0xffffffffffffffffffffffffffffffff

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: Display 0x042737c0: Unit 0: Startup Mode 1440 x 900, CGSThirtytwoBitColor, Resolution 1, ioModeID 0x80001000, ioModeDepth 0x0, IOReturn 0x0

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: CGXDisplaysDidReconfigure: Display added

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: CGXDisplaysDidReconfigure: Display removed

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: Display 0x042737c0: GL mask 0x1; bounds (0, 0)[1440 x 900], 16 modes available

Main, Active, on-line, enabled, built-in, boot, OpenGL-accel, Vendor 610, Model 9cdf, S/N 0, Unit 0, Rotation 0

UUID 0x2fa49b462ac314062ce76fce977d6525, ColorSpace { 189789772 }

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: GLCompositor: GL renderer id 0x01024301, GL mask 0x0000000f, accelerator 0x00003ab3, unit 0, caps QEX|MIPMAP, vram 451 MB

texture max 8192, viewport max {8192, 8192}, extensions NPOT|GLSL|FLOAT

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: Display 0x003f003f: GL mask 0x8; bounds (2464, 0)[1 x 1], 2 modes available

off-line, enabled, OpenGL-accel, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 3, Rotation 0

UUID 0xffffffffffffffffffffffffffffffff

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: GLCompositor: GL renderer id 0x01024301, GL mask 0x0000000f, accelerator 0x00003ab3, unit 0, caps QEX|MIPMAP, vram 451 MB

texture max 8192, viewport max {8192, 8192}, extensions NPOT|GLSL|FLOAT

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: Display 0x003f003e: GL mask 0x4; bounds (2465, 0)[1 x 1], 1 modes available

off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 2, Rotation 0

UUID 0xffffffffffffffffffffffffffffffff

Mar 2 14:39:13 Nick-MacBook-Air-2.local WindowServer[154]: Display 0x003f003d: GL mask 0x2; bounds (2466, 0)[1 x 1], 1 modes available

off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 1, Rotation 0

UUID 0xffffffffffffffffffffffffffffffff

Mar 2 14:39:15 Nick-MacBook-Air-2.local WindowServer[154]: **DMPROXY** (2) Found `/System/Library/CoreServices/DMProxy'. Run with arg = -discovery

Mar 2 14:39:15 --- last message repeated 1 time ---

Mar 2 14:39:15 Nick-MacBook-Air-2.local WindowServer[154]: CGXSetDisplayColorProfileAndTransfer: Display 0x042737c0: Unit 0; ColorProfile { 189789772 }; TransferTable (256, 12)

Mar 2 14:39:15 Nick-MacBook-Air-2.local com.apple.AmbientDisplayAgent[304]: AMBD Agent: xpc connection became invalid during event handler

Mar 2 14:39:15 Nick-MacBook-Air-2.local WindowServer[154]: CGXSetDisplayColorProfileAndTransfer: Display 0x042737c0: Unit 0; ColorProfile { 189789772 }; TransferTable (256, 12)

Mar 2 14:39:15 Nick-MacBook-Air-2.local com.apple.AmbientDisplayAgent[304]: AMBD Agent: xpc connection became invalid during event handler

Mar 2 14:39:15 Nick-MacBook-Air-2.local DMProxy[612]: AMBD Services: connection interrupted: com.apple.AmbientDisplayAgent (Connection interrupted)

Mar 2 14:39:15 Nick-MacBook-Air-2.local com.apple.AmbientDisplayAgent[304]: AmbientDisplayAgent started

Mar 2 14:39:15 Nick-MacBook-Air-2.local WindowServer[154]: CGXSetDisplayColorProfileAndTransfer: Display 0x042737c0: Unit 0; ColorProfile { 189789772 }; TransferTable (256, 12)

Mar 2 14:39:15 Nick-MacBook-Air-2.local com.apple.AmbientDisplayAgent[304]: AMBD initializing devices

Mar 2 14:39:15 Nick-MacBook-Air-2.local com.apple.AmbientDisplayAgent[304]: AMBD Agent: xpc connection became invalid during event handler

Mar 2 14:39:15 Nick-MacBook-Air-2.local DMProxy[613]: AMBD Services: connection interrupted: com.apple.AmbientDisplayAgent (Connection interrupted)

Mar 2 14:39:15 Nick-MacBook-Air-2.local com.apple.AmbientDisplayAgent[304]: AmbientDisplayAgent started

Mar 2 14:39:15 Nick-MacBook-Air-2.local WindowServer[154]: CGXSetDisplayColorProfileAndTransfer: Display 0x042737c0: Unit 0; ColorProfile { 189789772 }; TransferTable (256, 12)

Mar 2 14:39:15 Nick-MacBook-Air-2.local com.apple.AmbientDisplayAgent[304]: AMBD initializing devices

Mar 2 14:39:15 Nick-MacBook-Air-2.local com.apple.AmbientDisplayAgent[304]: AMBD Agent: xpc connection became invalid during event handler

MacBook Air, OS X Yosemite (10.10.2)

Posted on Mar 2, 2015 2:47 PM

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5 replies
User profile for user: chuck_3rd
chuck_3rd
User level: Community Specialist

Mar 4, 2015 6:02 AM in response to Haknat

Howdy Haknat,


Thanks for using the Apple Support Communities.


If you're still seeing no image on the external display after resetting the SMC and PRAM, then the next step I'd like you to do is to start the device in Safe Mode.


Reset the resolution

Start by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:

  1. Start up in Safe Mode.
  2. From the Apple () menu, choose System Preferences.
  3. Choose Displays from the View menu to open the preferences pane.
  4. Select any resolution and refresh rate that your display supports.
  5. Restart your computer.



If you tried all of these steps for your display and the video issues persist, contact Apple technical support or take your Apple computer to the nearest Apple Store or Apple Authorized Service Provider (AASP) for diagnosis. If you plan to visit an Apple Retail Store, make a reservation at the Genius Bar using http://www.apple.com/retail/geniusbar/ (available in some countries only).

Note: Diagnostic fees may apply for issues not covered under warranty or the AppleCare Protection Plan (APP).



Apple computers: Troubleshooting issues with video on internal or external displays - Apple Support


Take care,

Alex H.

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User profile for user: Haknat
Haknat Author
User level: Level 1
0 points

May 6, 2015 8:11 AM in response to Haknat

Problem fixed...

https://discussions.apple.com/thread/5381092

-----------------------------

Here's the fix that actually worked for me:


  1. Disconnect the mini-DVI cable from your laptop. (I'm pretty sure that's the cable I have.)
  2. Turn off your monitor.
  3. Unplug your monitor.
  4. Hold down the monitor's power button for two minutes (to "release the energy"...or, perhap, "release the hounds?")
  5. Plug your monitor back in.
  6. Turn on your monitor.
  7. Reconnect your cable to your laptop. (Okay, perhaps you do those last two steps in reverse order. I'm tired and cranky at the moment.)

----------------------------

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External Display No Longer Working (Air & Thunderbolt)

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