Andre Klein

Q: Dell U2515H on MacBook Pro 13" (Early 2011) flickers and loses signal

Dell U2515H on MacBook Pro 13" (Early 2011; 16 GB RAM, 256 SSD, Intel HD 3000 Graphics; Mac OS X 10.11.3). Directly connected through supplied Dell MiniDisplayPort to DisplayPort cable. If set to display’s native resolution of 2,560 x 1,440 px there is a huge problem getting a stable image. Check out his video:

 

https://www.youtube.com/watch?v=NTZKGiKwJYM

 

Restarting the Mac most of the time resolves the problem. One then can work for hours, but if the Mac goes to sleep, chances are high that the Dell U2515H begins to flicker again on wake up. If reduced to lower (interpolated) resolution (e.g. 1,080p) problem is gone. No problems at full native res on new MacBook Pro Retina (Late 2013).

 

This problem occurs with both of my U2515H displays. Swapped the mDP-DP cables, no improvement either.

 

Ideas anyone?

MacBook Pro, OS X El Capitan (10.11.3), MacBook Pro i5 2.3 GHz 16/256GB SSD

Posted on Feb 16, 2016 6:52 PM

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Q: Dell U2515H on MacBook Pro 13" (Early 2011) flickers and loses signal

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