FIX for Dell U3011 displaying YPbPr instead of RGB via display port

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Level 1

11 points

FIX for Dell U3011 displaying YPbPr instead of RGB via display port

I kind of hacked my way around and got my Dell U3011 to properly display RGB instead of YPbPr (or YCbCr) over a mini display port to display port cable for my MacBook Pro Retina 15"! WOOHOO! no need for that stupid $150 dual link dvi to mini displayport adapter anymore, which was incredibly flakey and sometimes the monitor turned on, and sometimes it didn't etc... lots of problems.

Download the file from:

http://www.8mmdesign.com/u3011-rgb-ypbpr-fix/DisplayVendorID-10ac.zip

unzip into:

/System/Library/Displays/Overrides

It will create a new directory called:

/System/Library/Displays/Overrides/DisplayVendorID-10ac

Then reboot the system, and it should work. Go to system preferences, displays, color, and set the display profile to Color LCD.

This will *ONLY* work for the Dell u3011 and it is completely UNTESTED. Use at your OWN RISK. But you should have proper RGB colors after doing this.

Good luck!

MacBook Pro with Retina display, OS X Mountain Lion (10.8.2)

Posted on Jan 30, 2013 5:15 PM

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Answer 1

aramjam

Level 1

0 points

Jan 31, 2013 8:09 AM in response to RyanLucier

Hi Ryan

Your fix seems to work!! Hurrah! Could you let us know the concept behind the hack? It would help us troubleshoot later.

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Answer 2

RyanLucier Author

Level 1

11 points

Jan 31, 2013 8:16 AM in response to aramjam

i used these 3 pages to figure it out:

http://legacy.tonymacx86.com/viewtopic.php?f=15&t=53970

http://embdev.net/topic/284710

http://en.wikipedia.org/wiki/Extended_display_identification_data

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Answer 3

CrisCros

Level 1

0 points

Feb 5, 2013 3:53 PM in response to RyanLucier

I wonder if we could use the standard mini display port to DVI. The dual display link used a DVI as output.

Best,

Chris

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Answer 4

RyanLucier Author

Level 1

11 points

Feb 5, 2013 8:55 PM in response to CrisCros

Im not really sure - but I do know the 27" and the 30" monitors are 2560x1600 or 2560x1440 typically. Which means, they need dual link dvi. I've never tried using just a displayport to dvi cable.

in any case, the displayport fix ive mentioned above has been working great since the day I posted it...

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Answer 5

iMapple

Level 1

10 points

Jun 9, 2013 7:11 AM in response to RyanLucier

Following up on Ryan's suggestion, someone has since created a script that *should* create a file with the appropriate fix for any given monitor. Look for "patch-edid.rb" here:

http://embdev.net/topic/284710#3027030

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Answer 6

Jun 30, 2013 7:19 PM in response to iMapple

I've been searching for a fix for the YPbPr problem with my Dell U3011 and this fix has worked perfectly for me.

http://embdev.net/topic/284710#3027030

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Answer 7

Colander

Level 1

0 points

Sep 22, 2013 10:54 PM in response to RyanLucier

I have tried this but I get a message on my U3011 which says Pleade change your input timing to 2560x1600@60Hz I have tried to do this in Display Preferances on my iMac but it only goes as high as 2304x1728.

Also I don't get a profile called Color LCD I get Dell U3011 EDID override, I don't know i this means anything.

Can someone help me with this?

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Answer 8

Sep 23, 2013 12:57 AM in response to Colander

SwitchResX may be able to help you. Download it and give it a try.

Clinton

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Answer 9

Dec 16, 2013 8:45 AM in response to clintonfrombirmingham

This post helped me: http://ireckon.net/2013/03/force-rgb-mode-in-mac-os-x-to-fix-the-picture-quality -of-an-external-monitor

I have an Onkyo AV Receiver TX-NR414, I'm using the HDMI passthru (connecting Mac to AVR, then AVR to TV) and my Macs where giving bad colors.

Connecting the Mac directly to the TV was ok.

So the problem was the need to force the Mac to output RGB, the above linked blog post has a link to a Ruby script that will create a profile with RGB output. Follow the instructions and it will get it right.

Thanks to this thread too:https://discussions.apple.com/thread/4880467

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