10.8 External Display issue

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bodinp Author

Level 1

0 points

10.8 External Display issue

MacBook Pro 15-inch, mid 2010

OS X 10.8

Dell P2210

Since upgrading to Mountain Lion, I can no longer get my external display (Dell P2210) to work - using DVI adaptor.

The Mac recognises the display and is outputting a signal, but the display constantly turns on and off. I can briefly access the settings in the monitor, where it says the resolution is 1840x1050 (60 MHz) - this monitor has a max resolution of 1680x1050 (60MHz) - and manually changing the display settings for the Dell does not fix the issue.

Everything else is working fine as far as I know.

*2 days ago, I was able use to an external monitor with a 1920x1080 resolution with no issues.

*The Dell still works with my old MacBook using VGA, so the monitor is not faulty.

Appreciate any assistance anyone might have with this issue.

MacBook Pro (15-inch Mid 2010), OS X Mountain Lion, External Display

Posted on Jul 28, 2012 7:06 PM

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Answer 1

a brody

Level 10

82,941 points

Jul 28, 2012 7:07 PM in response to bodinp

Try turning off Energy Saver.

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Answer 2

serguti

Level 1

4 points

Aug 1, 2012 6:50 AM in response to bodinp

Hi bodinp, did you had the issue with the display (from the MBP) shutting down unexpectedly ? (if you were using Lion you should had it). Now with Mountain Lion the MBP display work fine?... Please let me know.

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Answer 3

bodinp Author

Level 1

0 points

Aug 1, 2012 8:16 AM in response to a brody

This had no impact - problem still exists.

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Answer 4

bodinp Author

Level 1

0 points

Aug 1, 2012 8:23 AM in response to serguti

serguti:

No, I did not have any issues with Lion (10.7). I have only experienced this problem since I installed Mountain Lion (10.8).

The monitor is not faulty, because I can use it with my old MacBook, which is running Lion (10.7). The MacBook Pro (running Mountain Lion - 10.8) is not faulty, because I can use it with a different external display I have at work.

I have checked the DVI cable and DVI adaptor on another monitor and MacBook Pro and they both work, so I don't know what the issue is - I can only recreate it with this MacBook Pro when it's connected to this specific Monitor, but none of the hardware seems to be faulty.

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Answer 5

Aug 2, 2012 6:02 AM in response to bodinp

This is happening to me too.

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Answer 6

Aug 2, 2012 3:17 PM in response to bodinp

I am having a issue also. my screen is in 1920x1080 and it isnt filling the entire screen there is a portion missing on the left side.

I have tried to reset Pram and tried other cabels but it was working perfectly fine until the upgrade.

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Answer 7

Aug 3, 2012 6:09 AM in response to bodinp

I see the P2210 also has VGA and DisplayPort connections. Do either of those work with ML (I notice you said the VGA port works fine with Lion)? Has anyone with this issue tried a different type of connection (vs. different DVI cables)?

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Answer 8

Aug 3, 2012 6:34 AM in response to bodinp

I am connecting using a mini dvi to VGA connector and am having the issue.

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Answer 9

dylanwho

Level 1

10 points

Aug 3, 2012 8:56 AM in response to bodinp

I am using a Wacom Cintiq 24HD, I am having the same issue. I use a Macbook Pro with the lid closed, like it's a mini-tower, and my display starts to fire up upon waking it from sleep then shuts down immediately.

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Answer 10

dylanwho

Level 1

10 points

Aug 3, 2012 8:58 AM in response to dylanwho

Oh, I am using DVI with MDP adapter for my connection.

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Answer 11

jojo2322

Level 1

0 points

Aug 3, 2012 10:49 AM in response to bodinp

I am having the same issue connecting with a mid-2009 mpb to a 1280x1024 resolution monitor by VGA adaptor. Changing the refresh rate does not resolve the issue, but if I set the screen resolution to 1024x768, then my monitor stops going in and out. Obviously, this is not optimal.

Also, does anyone else see horizontal flashing lines in their monitor when it goes in and out?

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Answer 12

dylanwho

Level 1

10 points

Aug 3, 2012 10:57 AM in response to jojo2322

At least yours is coming on!

I hooked mine up to my MBP 13inch with it open, and was then able to close it and have it function. Still no luck with plugging in the monitor while it is closed and trying to wake it from sleep.

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Answer 13

whitesky

Level 1

0 points

Aug 4, 2012 4:30 PM in response to bodinp

I'm having the same problem since I upgraded to Mountain Lion. I'm using an MBA (late 2010 model) and a Lenovo display connected up by VGA.

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Answer 14

Aug 5, 2012 2:57 AM in response to bodinp

I had this problem even when I had Lion. However, I was able to solve the problem by using a cheaper external monitor with a lower resolution (originally my external monitor was a full HD display). Then, the problem went away. However, I updated to Mountain Lion today and the problem came back. I am using the new 2011 Macbook Pro with a mini displayport to VGA adaptor to my old Samsung SyncMaster P2050 display.

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Answer 15

dylanwho

Level 1

10 points

Aug 5, 2012 11:43 AM in response to Turtle Mike2

I have noticed too that this is only a problem when have my monitor hooked up. I hope Apple addresses this soon!

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