Andreas, thanks again for assisting with this same process on the 
u2713HM. Works great.

Hi Andreas, could you upload the file for the HM version as well? 
Thanks!

Is there any chance you could walk me through this process or upload an 
appropriate file for a Dell U3011?

Having the exact same problem, and it's been a real nightmare. Would be 
eternally greatful!

I'm trying to figure it out on my own but I'm not sure where to look 
within the output from ioreg -l -w -0 > ioreg.txt

Thanks in advance for any help, appreciate it.

Wow, you're a champion for doing this. I've been sporadically trying to 
solve this for almost 2 years!

I managed to work as far as I could by replicating what I imagined your 
steps are – I got everything else figured out except the <data></data> 
tag.

My monitor is a Dell 2709W, and my ioreg -l is attached to this post as 
a .txt file. If you could take a look I'd really appreciate it – or let 
me know how you calculated the <data></data> tag contents so I can do it 
myself!

Thanks again, really appreciated.

Hi, Andreas,

Could you please help me to solve this problem for dell u2711 ?

Thank you very much

Hi Andreas,

Many, many thanks for the script. Like Alex I have been struggling with 
this problem ever since I got tried to use a mini-DP to DP cable to 
connect a Thunderbolt MBP to a U2410 monitor (about 2 years ago!). The 
script works fantastically for me.

Interestingly, the same monitor works fine with my original unibody MB 
(i.e. a true mini-DP port), and also works great with my new laptop in 
Windows, so I guess there's a bug in OS X somewhere in relation to 
Thunderbolt and these monitors.

Thanks again!

Dave

Dear Andreas,

There is some problems with run of this script. Probably i am quite 
stupid and did something wrong. Could you please help me with this. I 
attached terminal screen.

Dear Andreas,

I have tryed all ways to switch off my macbook display and run this 
script with only external display connected: switch it to sleeping mode, 
than to wake it up with keyboard, but still the terminal command to run 
the script doesn't work :(

Probably I am doing something wrong with typing in terminal window.
Should i put this script file in some specific folder?

I will be very appreciate to you if you could help to fix it in "ioreg 
-l" data

+-o AppleDisplay <class AppleDisplay, id 0x1000003be, re$
| | | | | | {
| | | | | | "IOClass" = "AppleDisplay"
| | | | | | "CFBundleIdentifier" = "com.apple.iokit.IOGraphicsF$
| | | | | | "IOProviderClass" = "IODisplayConnect"
| | | | | | "DisplayProductID" = 41047
| | | | | | "IODisplayEDID" = <00ffffffffffff0010ac57a04c353930$
| | | | | | "IODisplayPrefsKey" = "IOService:/AppleACPIPlatform$
| | | | | | "IOPowerManagement" = {"MaxPowerState"=3,"CurrentPo$
| | | | | | "IOProbeScore" = 2000
| | | | | | "IODisplayParameters" = {"bgsc"={"min"=0,"max"=6553$
| | | | | | "IOMatchCategory" = "IODefaultMatchCategory"
| | | | | | "AppleDisplayType" = 2
| | | | | | "IODisplayAttributes" = <676174760000000073676c6600$
| | | | | | "AppleSense" = 37119
| | | | | | "IODisplayConnectFlags" = <c4410000>
| | | | | | "DisplayVendorID" = 4268
| | | | | | "DisplaySerialNumber" = 809055564
| | | | | | }

Thank you

Hi Andreas,

Thanks for the RGB fix. I'm using the Dell U2713H on a new iMac.
Unfortunately there is a very serious problem with this display and I 
was wondering if you know if that's coming from Apple too:
After Hardware Calibration of the display (or using any other color 
profile besides "Standard") there is heavy green ghosting when I drag a 
window around. It is truly horrible.
Do you know if this is also connected to some Apple to Dell problem and 
how can it be fixed?

Thanks
Sebastian

I have Dell U2713H, and 15" rMBP and I filed a support ticket with Apple 
and they sent me a program called TimingSnoop to collect diagnostic 
output. That program seems to collect all EDID information, driver 
details and pretty much all display information. I sent them back the 
output but haven't heard back from them after that.

Forcing RGB seems to make some improvement, but the display is still 
very bad.  There is still some ghosting/fuzzy behavior and it does look 
like some sort of timing/refresh issue. Prior to forcing RGB, I was 
reducing the sharpness levels on the monitor all the way to zero and it 
seemed to make similar improvement.

Hi,

I just got the Dell U2713H monitor. I connected it with a macbook air 
mid 2011 model (Thunderbolt minidp) using a mini dp to mini dp cable.
I didn't have the YcBcR issue, although OSX system profile reports the 
monitor as "television".
The colors are fine and the Monitor color mode is in RGB as expected
The problem I have is a strange ghosting (probably an RTC overshoot 
issue) when moving windows or scrolling text!

I see Sebastian and Kr have also this specific problem, did you have any 
news from Dell or Apple support?
I have tried the EDID override thing but it doesn't seem to correct the 
"ghosting" issue. I have also tried connecting with several other dp 
cables but the issue is still there.

Has anyone tested this particular monitor with a standard DVI-D PC ?
This is the only test I have not done yet.

@andreas, yes I have already set the sharpness to 50 without which the 
display is unbearable but even with this workaround I still think that 
there is some ghosting/clarity issue.

@teowood
Apple closed my support ticket as a duplicate of another ticket and 
Unfortunately I'm not able to see the details in the other ticket.

I also want to test the display with a dual-link DVI connector but 
havent had a chance to do it and Dual Link DVI adapters are expensive

Well a pc with a good VGA card should be capable for a dual link DVI, no 
extra adapter needed. I am waiting for my alienware to arrive. I should 
do the test soon.
Meanwhile what i have noticed is that dropping the contrast from the 
default 50 to 40 or 39 almost makes the ghosting go...
I am thinking if i have to live with that or return the monitor :(

Hi All

New to the forum and had high hopes for this fix but alas on my Samsung 
SyncMaster SA350 it seems to have compounded the issue. Now the external 
monitor isn't recognised at all having applied the script.

I (foolishly) didn't backup the initial settings. Can someone tell me 
how to rollback?

Thanks in advance.

A quick thanks to Andreas and others you have contributed to this 
thread.  I recently purchased a U2713HM to use with my mid-2010 MBA and 
ran into the expected issues, first with getting the right cable to 
drive it at the full 2560x1440 resolution (mini-displayport to 
displayport is the cheapest solution), then with the issue of "off" 
colors and odd processing artifacts when it is being properly driven in 
YCbCr rather than RGB.  (I think some are not realizing the problem 
because the Mac will report that it is using RGB - you have to use the 
OSD on the monitor to discover what mode is it actually in.)

Anyway, using the attached file solved the problem completely and the 
display looks great.

- Mark

Many, many thanks for this Andreas!  My Dell U2410 worked beautifully on 
my 2006 MacBook Pro and via DVI-to-MiniDP on my new MBP retina, but the 
HDMI output looked lousy.  I had to take up a Thunderbolt port to use 
the monitor, but with this fix I can now use the HDMI and free up the TB 
port for a drive.

Thank you again!

John

Vitaliy,

I had the same problem. I suspect you are using 10.7 as I had the same 
error. Upgrading to OSX 10.8 allowed me to run the ruby with no error. I 
don't know ruby so it was easier for me to get the new OS instead.

Hi,
I have had the same issue as everyone else with my new Macbook Air 
connected via HDMI to a LG E2260 monitor.

I apologise, but I have absolutely no programming experience. I 
eventually found out how to "open terminal" but when I did enter the 
"ruby patch-edid.rb" into the terminal nothing happened. I suspect that 
I will need an external keyboard and mouse for this to work for the next 
step as I obviously cannot type anything with the macbook lid closed?

Could someone take a dummy through the procedure in simple steps?

Thankyou

I'm not sure if the problems that Katie and some others are reporting in 
this thread are the exact the same issue that we are all discussing 
about.

It is easy to confuse bad display resolution issue with the 
ghosting/fuzziness problem. If you need to drive really large resolution 
like 2440x1560 you need display port/mini-display/Dual Link DVI adapter, 
HDMI/SVGA adapters won't cut it and display wont look sharp with it

The original thread here is about Retina Macbook Pro models driving 
external display with 2440x1560 resolution or higher having two set of 
issues
1) Fuzziness/Ghosting issue on Dell U2713H/HM models
2) Macbook pro recognizing the external display as TV and hence using 
YCbCr instead of RGB mode.

AFAICT, Andreas script only forces RGB mode I don't think it solves the 
display quality problem, atleast not on my Dell U2713H.

FWIW, I removed the display override, tried the Apple Mini DisplayPort 
to Dual-Link DVI adapter to see if it improves the display, it doesn't. 
With Dual Link DVI adapter I do get the RGB mode automatically without 
the override but the display is bad to my eyes and My comparison here is 
the Apple Thunderbolt Display.

I have decided to return the dual LINK DVI adapter, and switch back to 
mini display port adapter. Now I'm not even using the YCbCr override, 
but adjusted the monitor settings (Uniformity Compensation Off, Smar 
Video Enhance off, sharpness set to zero) to get the same display 
quality.

Thanks so much!

This worked for me. I updated my macbook pro retina to 10.8.3 which 
still didnt work.

So downloaded the U2713H override and copied into the folder as stated, 
rebooted and perfect!

New dell ultrasharp u2713h working as it should.

Hi all,
I am a mac newbie and I am about ready to take it back due to this hdmi 
monitor thing (I have one more day to figure this problem out before I 
can take it back).  I have good color on it, and have downloaded OS X 
10.8.3.  Pictures, etc., look decent, but all text is still blurry. I 
have spent a couple of hours trying to get the display right...still 
nothing.  I am running hdmi-hdmi from my late 2012 mac mini (which I 
have read on other forums that this script works for).  My problem is, I 
don't understand mac coding and I can't get the script to run.  I 
download the script from above by saving the link to downloads.  I then 
open terminal, type in "ruby patch-edid.rb" and the only response I get 
is "command not found".  The process sounds simple as everyone says you 
just type that into the Terminal and a new folder will be created which 
you can then move to systems/library/displays/overide.  Is there 
something I am not doing right?  I really appreciate your help as I 
really like the new mac mini and want to keep it.

Hi,

Andreas - you are a genius. Many thanks.

Your script worked fine for my HP LP2475w - I've been searching for a 
fix for ages.

Apologies for the dum questions, I just came over to MAC OS with the 
purchase of a iMac 27.  I have a dell U2410 attached as a second monitor 
via mini-display to display port. Actually, the colors on the Dell seem 
fine, my problem is text.

Regarding the code you posted as universal fix for forcing external 
monitors to RGB: 1) What kind of file should I copy the code into 2) 
What should I name the file 3) where should I save it in order to run it 
3) How do I run it?

I tried copying the code into apple script editor and running it that 
way, but I get syntax errors.  I also tried just saving into a text file 
called patch-edid.rb and running from terminal, no joy.

Thanks for your help

Hi Andreas,

I use the U2713HM with a MBPr and have a problem with the screen 
flickering completely when scrolling certain websites (fine patterns 
seem to cause this behaviour, play.google.com is such an example, looks 
like a signal processing artefact). My display is also detected as a TV.

I'd like to apply your fix (thanks a lot for sharing your expertise!!!), 
but I use the DP audio output. As you fix removes some extensions, audio 
seems to be broken afterwards.

Is there a way to fix that problem without disabling DP audio?

Thanks in advance!

Update: Applied the fix, DP audio still works.

Update2: RGB works now, but annoying flickering with certain websites 
persists.

Does anyone know if this fix is necessary/works with OSX 10.6.8?

I have a new 27 inch iMac (2013 spec) on 10.8.3 and a Dell U2713H second 
monitor. I got the mini displayport to display port cable - and the Dell 
picture is clear at full 2500x1440 resolution BUT - the picture looks 
washed out and I cant get the same color balance as the apple.  I am not 
sure if this is just a difference in displays - or is the issue 
discussed in this thread:   When I go through the Dell screen settings - 
if I turn it to RGB - it goes awful - completely NG - so does that mean 
it is receiving YCbCr?
I then tried to follow instructions on this thread but am not familiar 
with terminal etc...

I downloaded "U2713H_U2713HM_Mac_EDID_override.zip" and put it on 
desktop
I opened them both and choose the one with U2713HM in it (and deleted 
the other)
I opened terminal and typed  "ruby patch-edid.rb".
But this came up with an error message ?

So I am stuck - but would greatly appreciate any help :)

Hi Andreas -

I have the U2713HM, which I have just had replaced due to the following 
issues:

- faint diagonal lines across the whole screen
- image noise when moving windows/scrolling pages
- strange flicker across whole screen if an image on my screen changes 
brightness quickly

The replacement monitor is suffering from the same problems.

I have tried using the Override files you provided but cant tell if this 
has changed anything. How do I see what colour space the monitor is 
using? I have gone into the monitors settings and it appears it is using 
YCbCr. But if I change that to RGB, the screen has a green and red tint 
applied.

The screen is connected to my Macbook Pro Retina via Mini DP to DP.

Any help much appreciated as this is driving me crazy and would really 
like not to have to send it back to Amazon again!

Thanks!

Dom

Hi Dom,

You can't change it manually: screen goes crazy if you do - I have the 
same setup exactly except I have the H instead of the HM.

You can use either the file at the very top of this page or the script a 
little way down. Either way should leave it that when you look at your 
monitor's settings, it will display RGB (after a reboot). After applying 
the script it should leave it perfect!

Using MBR with 10.8.3 and Dell U2713HM
I extracted the U2713H_U2713HM_Mac_EDID_override.zip and moved the 
contained folder into /System/Library/Displays/Overrides

I restarted the notebook with the connected U2713HM but this monitor 
stays black. Nothing to see… :-(

What I'am doing wrong?

OK, found the problem - my mistake. You have to set the Input Source at 
the monitor to DisplayPort manually... now it works perfect... thx 
Andreas :-)

I had to slightly modify the script for it to work with a Dell U3014. 
The EDID was cut off without an additionally "-w 0" parameter to the 
ioreg command.

Attached the updated script. Thanks. Works perfectly now :)

I've got the U241§3 on the non Retina Macbook Pro 2012 model and had 
loads of the issues most people mentioning. Colour being off, not 
looking sharp, basically looking worst than a cheap monitor! Thanks you 
so much for this, the script works perfect and the monitor now looks 
great.

This script doesn't seem to work with an hp pavilion 23bw. can you help 
on this one?

Thanks

YES YES YES! Worked a treat - shame it doesnt get rid of the ghosting on 
my DELL U2713H!

Thanks so much!

I'm executing script only with external monitor and got this

/System/Library/Displays/Overrides/patch-edid.rb:9: undefined method 
`[]' for nil:NilClass (NoMethodError)

what I'm doing bad?

Thank you so much for your solution. I was sick and tired with DELL 
U2713H changing settings on its own when connected to mac as a secondary 
display.
It was so frustrating to work with photographs in Adobe Lightroom and 
not seeing consistant color and tone, because display was tweeking it 
self for some reason.
I was going to sell it and get another one...
I did as you advised and now it doesn't tweek the color and tone and 
works consistently.

Thank you for your effort to figure this issue out and sharing it with 
the rest of the world. Appreciate it a lot!

Sergey.

I have an older 2011 MBP with thunderbolt, and a Dell U2713HM.
Currently connected via a mini -> display port, I dont see too much of a 
problem other than the dell looks vastly less sharp than I would expect 
for such a high res monitor even at 2560x1440. (Sharpness has to be ~75 
to look decent, any higher and I get halos, lower and it looks scaled)
Would this 'hack' help me? Most of the replys are from retnia based 
MBPs.

If I don't want to remove the extensions block, should I delete the 
following lines from your script?

puts "Number of extension blocks: #{bytes[126]}"
puts "removing extension block"
bytes = bytes[0..127]
bytes[126] = 0

bytes[127] = (0x100-(bytes[0..126].reduce(:+) % 256)) % 256


Is this correct? Will the checksum be recalculated correctly?

The script that was supposed to work on various models worked fine for 
me on the u3011, with the new u2413 I cannot get it to work properly. 
The sharpness and image is fixed but when editing in Premiere there is a 
purple box the fills the area that the video is being played. As soon as 
I stop playback it returns to normal. Sometimes I have a large purple 
box overlaying the screen thats about 80% the size of my screen. Tried 
for a screenshot, but this is caused by the monitor.

Videos I play in the browser also do this. Notice the overlay on just 
the video, it extends past the player slightly.

I was just about to post the same issue as Ryan - overlay on video 
players. But had a one last look in the settings and found that turning 
off Smart Video Enhance gets rid of the overlay. See attachment

Works great! I noticed my problem but did not know how to solve it. Your 
solution came to rescue nicely.
Thanks

Thanks to GabrielMichael. I too fixed the problem with the display 
override profile, but was getting the light blue overlay on video 
content in the browser in OSX 10.8.3 on a rMBP, connected via a cheap 
mini-DisplayPort to DisplayPort cable.

This was fixed, as GabrielMichael says, but turning off Smart Video 
Enhance. Everything now looks great.

Thanks! :-)

Hi everyone

i have an imac 21.5" and just baught a Dell U2913wm monitor and have the 
YCbCr issue.

i have followed the steps andreas has given and the terminal has created 
the new folder correctly but i dont have the Displays folder in my 
library
my OS X is in french but there is not such folder or similar folder in 
the library folder

thanks in advance for your help

Hi,

I am a MacPro 2009 / Ati HD4870 user looking for a 24"-27" screen to 
properly work in Adobe RGB gamut.
I found this web page looking for info to find a good screen for CGI 
games and films modelling, worried because of the 8bit (not 10bit) 
framerate output signal of apple machines.

I actually haven't decided any monitor yet, so I don't own any U2713H/HM 
monitor. Anyway I just wanted to thankyou for making fixes and sharing 
them with other people, even when some brands which make and sell 
screens or workstations don't.

THANKYOU Andreas Schwarz

update...

The 'burnt-in images' dissapated over the course of 5-6 hours. Monitors 
seem ok now.

I found several other references to similar issues with the monitors.

Hi,

I am also getting the error mentioned above while running the script:
warning: Insecure world writable dir /usr/local in PATH, mode 040777
patch-edid.rb:9: undefined method `[]' for nil:NilClass (NoMethodError)

Any Idea?

Thanks
Oriol

Same error, with my MacBook Air with Lion, and with my MacBook Pro with 
Mountain Lion...

MBAir:Downloads israel$ ruby patch-edid.rb
patch-edid.rb:26: undefined method `[]' for nil:NilClass (NoMethodError)

Any other option, in other language? I am developer, but zero idea about 
Ruby, and I can not translate this script to another language...

I updated the script with the change suggested by BugRoger to prevent 
truncated lines. Please download and try again.

http://embdev.net/attachment/168316/patch-edid.rb

So here is an interesting thing I found.

I recently purchased a Dell U2713H, and while it worked fine, recently 
it started going into 1080p mode only. This frustrated me quite a bit, 
and below are my learnings (how I fixed it).

My setup:

Macbook Pro Retina 2013 model (two minidisplay ports)
Old Apple Cinema Display ADC - Plastic Shell (1600x1024)
Dell U2713HM 27"

See attached image how I have the graphic hooked up. The Acell cable is 
for the Dell, the other for the Cinema Display.

I tried everything, holding down Option and clicking on "Scaled" in 
displays, restarting, running funky scripts, connecting only one screen 
etc. Nothing worked, although it did work at first.

Then... THEN!! I accidentally switched MiniDisplay ports. I put Dell's 
cable where the Cinema was plugged in and vice versa. Presto!! It 
worked!

Now it works right every time, in-sync with the on/off of the rMBP's 
screen, and when I tried to switch them around (just to test) I was 
experiencing the problem again.

Hope this helps!

Would somebody mind clarifying for me whether it's in fact necessary to 
run a script? I've simply dragged and dropped the files into the 
specified directory and now see Dell U2713HM EDID override in System 
Preferences following reboot. Is that it?

I have just received my DELL U2713HM screen today and connected it up to 
my 27" iMac using the supplied DVI-D cable and Thunderbolt to DVI 
connector.
I am happy with the colours on the Dell monitor, but my problem is that 
the Dell does not want to go up to max resolution of 2560x1440 to match 
my iMac's resolution.
Can you point me in the right direction for a solution.

I have the same question related to monitor calibration posted by "Nolan 
Snook". Using this EDID override, is color calibration still possible 
with i1Display Pro, Spyder, Lacie and etc?

I mainly work with images, so I need the colors to be accurate.

I feel like an idiot, as this patch seems to be working for most people. 
I am unfamiliar with linux and have rarely opened the terminal on my 
mac.  Could someone explain in english (as though they were explaining 
this to a child)  how to use the patch to force my macbook retina to 
rgb?

I opened my terminal and pasted in "ruby
patch-edid.rb"

but nothing happens.   I am also unsure how to get to my home directory 
via terminal.  And then once I do, do I copy and past this code into the 
terminal?  So confused, sorry.  Hope someone can help.  Thanks.

1

require 'base64'

2

3

data=`ioreg -l -w0 -d0 -r -c AppleDisplay`

4

5

edid_hex=data.match(/IODisplayEDID.*?<([a-z0-9]+)>/i)[1]

6

vendorid=data.match(/DisplayVendorID.*?([0-9]+)/i)[1].to_i

7

productid=data.match(/DisplayProductID.*?([0-9]+)/i)[1].to_i

8

9

puts "found display: vendorid #{vendorid}, productid #{productid}, EDID:\n#{edid_hex}"

10

11

bytes=edid_hex.scan(/../).map{|x|Integer("0x#{x}")}.flatten

12

13

puts "Setting color support to RGB 4:4:4 only"

14

bytes[24] &= ~(0b11000)

15

16

puts "Number of extension blocks: #{bytes[126]}"

17

puts "removing extension block"

18

bytes = bytes[0..127]

19

bytes[126] = 0

20

21

bytes[127] = (0x100-(bytes[0..126].reduce(:+) % 256)) % 256

22

puts 

23

puts "Recalculated checksum: 0x%x" % bytes[127]

24

puts "new EDID:\n#{bytes.map{|b|"%02X"%b}.join}"

25

26

Dir.mkdir("DisplayVendorID-%x" % vendorid) rescue nil

27

f = File.open("DisplayVendorID-%x/DisplayProductID-%x" % [vendorid, productid], 'w')

28

f.write '<?xml version="1.0" encoding="UTF-8"?>

29

<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

30

<plist version="1.0">'

31

f.write "

32

<dict>

33

  <key>DisplayProductName</key>

34

  <string>Display with forced RGB mode (EDID override)</string>

35

  <key>IODisplayEDID</key>

36

  <data>#{Base64.encode64(bytes.pack('C*'))}</data>

37

  <key>DisplayVendorID</key>

38

  <integer>#{vendorid}</integer>

39

  <key>DisplayProductID</key>

40

  <integer>#{productid}</integer>

41

</dict>

42

</plist>"

43

f.close

Andreas Schwarz wrote:
> You are probably using a Single Channel DVI converter or cable, which
> does not allow the full resolution. Use a (Mini)Displayport cable.

Thanks Andreas: You were absolutely right. I bought a Mini-Displayport 
to Displayport cable and now have full 2560x1440 resolution. Yay! 
Appreciate the help.

Huzzah! Thanks very much for writing this. It's like coming out of a 
discoloured fog and it also as a side-effect solved a problem I was 
having where it liked forcing my U2711 into 1080p instead of native res 
over DisplayPort.

Ah, now it's working.  Actually the script didn't work in the terminal 
until I rebooted the machine first.  Thanks again!

When I enter the "ruby patch-edid.rb" in Terminal nothing happens.

What can be the reason for that?

My screen still is pink when I change to RGB mode.

In my MBP 2012 with 2713h works your hack like a champ!! Thanks!!!!!

THANK YOU!!! This is tremendously useful. My Dell U2713H was working 
fine connected to my MacBook Retina, then one day it started showing up 
as a TV and I couldn't get native resolution. Your fix works like a 
champ!

Andreas Schwarz wrote:
> Try running the attached script. Open Terminal and enter "ruby
> patch-edid.rb". This should give you an override file for your display.

I've clicked this link and it only takes me to another window showing me 
the script, rather than downloading it. Do you have any idea why this is 
happening. Could the DL link be dead or something? I really want to fix 
my monitor issues but it's not letting me.
Thanks

Hi,

I am trying to create this override folder for an LG monitor (27ea83), 
however
1. Chrome wouldn't let me download the file, just opens it as a link, so 
I have to paste the code into TextEdit then save it as .rtf then rename 
the file and click use as .rb
2. though the file is in the right folder, when I run the command in 
terminal it gives me the following error: patch-edid.rb:1: syntax error, 
unexpected $undefined, expecting '}'
{\rtf1\ansi\ansicpg1252\cocoartf1187\cocoasubrtf390

I looked through the code but all { seem to have a }, so I don't quite 
understand what the issue is. Also, I am completely illiterate when it 
comes to linux, so not the slightest clue as to what I'm trying to do 
which makes debugging ever so difficult :)

Anyone any thoughts?
Is the script being screwed up by me having to save it as rtf first?







PS. Andreas, thanks a million for the DELL files, they worked like a 
charm!!!

<rant on>
until I had to return one U2713H monitor after another whilst trying to 
decide which is the bigger pile of dung, DELL quality assurance or their 
atrocious customer service. A word of advice: don't buy DELL, especially 
if you're outside of the US, they just get your hopes up with truly 
amazing colours, then let you down in every other way imaginable. Amazon 
told me after the second return that they won't even bother replacing 
it, the whole batch is a waste of space, and that I should order 
straight from DELL, as they would have the latest versions, which might 
actually work. Not if I can help it, thank you.
<rant off>

Hi. I'm not bright when it comes to running scripts but can you tell me 
exactly where to / how to run the script that you recommend to over-ride 
Mac display settings? I clicked on the link and it gave me a page of 
code - where do I put it before entering the command into the terminal? 
Really sorry for being a bit thick on the matter!

Fixed the problem with brand new Haswell Air and Dell U2410. Thanks a 
bunch!

--Pasi

Hi,

I'm experiencing the same problem with 15" Macbook pro Retina and Dell 
U2312HM.
I've tried the script but the problem remains.

Do I need to change something in the script for it to work?

thanks!

I'm also using a DELL U2312hm monitor with rMBP15" and applied the 
script, copied the new folder and chose it in the Color tab under 
display (in preferences). I'm not sure there's a big difference, the 
text on Google results is a bit blurry (my eyes are tired after a few 
minutes of reading).

does anyone else experiencing the same?

attached:

print screen (example)
the script output file


Please help me.

I've just discovered this thread, as I'm having a similar problem with 
my HP 22" HDMI monitor.  Local Apple store folks spent a total of 2 1/2 
hours fiddling and I'm still seeing blurred text on the monitor when 
connected to my new MacBookPro.  The monitor worked fine with my old 
white Macbook.

Main question I have for this list--which I saw raised above, but not 
answered--is if this fix works with HDMI as well as DVI?

Hi,
not trying to derail the thread, but you guys are closest to a solution 
to my related problem, so maybe you could help.

My problem is actually the inverse: my 2010 MBP decides to output full 
range RGB even though it correctly identifies my TV as a TV, provides 
overscan slider etc.

My TV is capable of reproducing full range RGB and probably correctly 
advertises this in the EDID. As I have connected multiple devices 
through an AVR, some of which only output limited range/ycbcr I would 
however like the Mac to output ycbcr as well.

(My gf's MBA running the same version of OSX (10.8.4) outputs 
ycbcr/limited range btw)

What would I need to change in the script to inverse its behaviour, 
forcing ycbcr output?
(I read up on EDID a little bit and think I should set bits 4-3 of byte 
24 to "10" but I am neither sure about that, nor how to convert that to 
the encoding used in the plist nor if I would have to change anything 
else in order to not break things.)

Any help would be highly appreciated!

I just wanted to thank you for making this file available, it's made 
quite a difference to my dell u2713h display, everything is that more 
crisp.

Again, thank you
Patrick

Hi,

Thanks very much for posting this script.

I have a Dell U2711 with a 2012 Retina Macbook Pro.

I haven't ever noticed any visual/image problems like some people have 
regarding blurry text or wake for sleep issues but I have always noticed 
the YPbPr issue.

I noticed this script however disables support for audio over the 
displayport for the monitors, I wondered if it is possible to remove 
this feature from the script since I do require displayport audio to 
hook my U2711 up to my external speakers.

Thank you very much for this solution.

Also I haven't upgraded to 10.8.4 yet, does anyone know if there was an 
official fix applied?

Hi Andreas,

Apologies, I did not fully test the script before posting that reply.

I found my audio works fine over Displayport still without modifying the 
script.

It seems to be working fine, I've definitely noticed the change in 
certain colour's compared to over YPbPr previously. Also I can now use 
the sRGB feature of the monitor which previously never worked for me on 
YPbPr.

My only question is are there any other 'side effects' from using this 
script since it has removed extension blocks?

Also I ran this script when I had my setup in multiple display mode, the 
U2711 was my primary display though so I assumed it would pick up the 
primary display which it has done, does this matter?

Thanks again

Hi Andreas,

I'm having a different issue that will require the same solution, I 
fear. I'm attempting to connect a 2009 MBP to an older Mitsubishi 
projection HDTV via MDP to DVI, OS 10.8.6 keeps forcing the color space 
to RGB, the TV takes YPrPb DVI signals. I was fiddling around with the 
code for your patch and I think I only have to change the line that 
refers to forcing the EDID in to RGB, I'm not exactly a software 
developer and was wondering if you could direct me on how to convince 
this Mac to do the opposite of what does for Dell monitor owners?

Thanks,
Kevin

Hello again,

I wanted to confirm to anyone searching that the script provided on here 
(at http://embdev.net/topic/284710#3027030) works like a charm for the 
Dell U2711.

I have been using it for a few weeks now. I did not need to modify 
anything.
It correctly forces my Retina Macbook Pro to use RGB for the display 
over Displayport instead of YPbPr.

This now allows me to use the monitors sRGB feature (which never seemed 
to work right on YPbPr). I have not noticed any other side effects. 
Sound over displayport works fine and there has been no issues with 
waking (I didn't have any before though).

I also saw some people mentioning way above about the display having 
ghosting. Unfortunately this seems to be a downside of the DellU2711 and 
it does this with whatever it is plugged into (windows, mac, HDMI source 
etc.).


Thanks again for your script.
It has saved a lot of my time and has prevented me from buying 
additional things to fix it, since I do a lot of photography, graphic 
and web design, colour accuracy is important for me.

I would recommended that anyone using a Dell display with a Thunderbolt 
Macbook downloads this script!

Thanks

Alex

Thank you Sir! You saved me from having a heart attack.

I'm having a similar problem with EDID and I'm not sure if this will 
help fix the problem, maybe you can shed some light.

Number of Mac Mini's MBP (4 total). Using "Display Port" to VGA adapters
IO Gear KVM - "VGA" in/out.

My problem is that on my main Mac mini, a mid-2011 which actually uses 
Thunderbolt instead of a Mini Display port, won't read the EDID of the 
monitor though the KVM.

IOGEAR recognizes the issue, but won't fix it but "recommends" a KVM 
that is 4 times more expensive.

My work around is:
1) Boot Mac mini which shows the right resolution, but it is shifted 4 
inches to the right.  Detect displays comes back with unknown.
2) Unplug VGA from KVM and put it directly into Mac Mini adapter, Detect 
displays correctly identifies HP2509 monitor, the image centers on the 
display.
3) Plug Mini back through KVM everything is good.
4) Turn off sleep and enable screen saver, so it never sleeps - it never 
loses EDID.

An older MacMini, older MBP, mid-2012 MBP don't have any problem 
recognizing the monitor through the KVM.  I've tried swapping adapters, 
cables, ports but just can't get it to work.

I'm hoping I can grab the correct EDID and use the Override to force it 
to HP2509 when it doesn't think there is anything attached.

Thoughts?

Hi Andreas,

first thanks for your support... I run the script and tried to copy the 
generated folder into Library/Displays/... but I can´t see a Folder 
called Displays in my Library.

Do you know why? What can I do?

I just bought a LG 27EA83R-D monitor and had the same problem. The 
script fixed it. You're awesome. Apple is a PITA. Thanks for creating a 
fix!

I am still having the blurry text. I tried everything mentioned in this 
forum, any help will be very much appreciated

Hi there,

Not sure if this will help, but I also had a flickering problem.

Quite by chance, I was rearranging my desk and needed to change where 
things plugged in.

I plugged the Dell in to a 'proper' surge protection socket (not a 
consumer cheap one) and when I switched everything back on the 
flickering had stopped. So I had a 'dirty' power supply or something.

I still get some flickering on visiting certain webpages with fine 
textures, but 99% of my flickering display seems to have stemmed from 
the inadequate power supply.

I hope this helps.

mg wrote:
> I am still having the blurry text. I tried everything mentioned in this
> forum, any help will be very much appreciated

I experienced the same problem and adjusted the sharpness setting down 
to zero and now text is readable.

Thanks very much for posting this. I am running on MacMini and the EDID 
override solves my display problem completely.
 I am trying to get audio over the display port as well - is it possible 
to do a version with audio enabled?

Thanks

Do you guys know how to fix the blurry fonts problem on external 
display?
fontsmoothing settings doesn't make it better.

Does any of you have it too? using a win7 VM produces excellent display 
(fonts included), OSX doesn't.

Thanks!

HI Andreas!

Thanks for the awesome script, I have multiple dell u2711 monitors 
hooked up to my 15 macbook retina. Do you know if this works with 
multiple monitors? at this point I was only able to get one to work out 
with the script :(

Any ideas?

thanks a bunch!

HI there

Can this script work with other monitors?

I have a new LG 29EA93 running with a brand new Macbook Air (with the 
G500 GFX card) running at 2560 x 1080

IF you could help with a file for that you would be a bit of a hero to 
me!

Andy

Hi Andreas,
I have a mba 2012 and connect to U2713H at home and a "standard" monitor 
at work. In case I apply the fix script forcing RGB, which fixes the 
U2713H problem, will it cause a problem with the "standard" monitor?
Thanks again
Noam

I hope someone will be able to help my problem, blurry fonts on external 
display.

http://apple.stackexchange.com/q/99020/55144

Just upgraded to Mavricks and it reverted to the old "television" color 
profile for my Monoprice 27. I just ran the script again and it worked 
great. Thanks!!

Mavricks 10.9
2012 Macbook 15

I just installed mavericks and i can't reinstall the patch to fix this 
issue, error log:

found display: vendorid 4268, productid 41004, EDID:
00ffffffffffff0010ac2ca0533437321012010380342078eab325ac5130b426105054a5 
4b008180a940714f01010101010101010101283c80a070b023403020360007442100001a 
000000ff004a55343336383447323734530a000000fc0044454c4c20323430385746500a 
000000fd00384c1e5311000a202020202020013002031bf1489005040302071601230907 
0765030c00100083010000023a801871382d40582c450007442100001e011d8018711c16 
20582c250007442100009e011d007251d01e206e28550007442100001e8c0ad08a20e02d 
10103e960007442100001800000000000000000000000000000000000000000000000000 
00000047
Setting color support to RGB 4:4:4 only
Number of extension blocks: 1
removing extension block

Recalculated checksum: 0x39
new EDID:
00FFFFFFFFFFFF0010AC2CA0533437321012010380342078E2B325AC5130B426105054A5 
4B008180A940714F01010101010101010101283C80A070B023403020360007442100001A 
000000FF004A55343336383447323734530A000000FC0044454C4C20323430385746500A 
000000FD00384C1E5311000A2020202020200039
patch-edid.rb:33:in `initialize': No such file or directory - 
DisplayVendorID-10ac/DisplayProductID-a02c (Errno::ENOENT)
  from patch-edid.rb:33:in `open'
  from patch-edid.rb:33:in `<main>'
federicos-mini:Overrides abadfederico$

Just upgraded my 2010 MBA to Mavericks and I immediately thought, "the 
fonts look funny".  Sure enough my EDID override file was gone and my 
U2713HM was in YPbPr rather than RGB mode.

I was able to fix it by simply repeating the steps I had done earlier: 
copying the DisplayVendorID-10ac folder (which is in a zip file in the 
very first post in this thread) and placing it in 
/System/Library/Displays/Overrides.  After a reboot, I was back in RGB 
mode.

So at least for the U2713HM, the previous fix still works, but you have 
to do it again - Mavericks wiped out the old fix.

- Mark

Installed Mavericks. Works fine after repatching. Thanks a lot for your 
patch!!!♥︎♥︎♥︎

just FYI, I was not able to get this to work with mavericks on a u3011, 
tried reusing the script with no luck

Doesn't work well with Mavericks :(

Dell U2713H no good after Mavericks upgrade and reapplying the file. 
Worked fine on Mountain Lion. :(

The script DID work for my U2413 after upgrading my 2011 MBP to 
Mavericks, just like on Mountain Lion.

the weird thing for me is after using the script, it is creating a 
profile but the monitor is still staying on a YCbCr colour space instead 
of RGB when I navigate through the monitor menus (dell u3011)

ok I think I managed to fix it. Reinstalled mavericks, I disconnected my 
second monitor (dell 3007WFP), then executed the ruby patch above. 
Afterwards, I copied it to system/library/displays then rebooted.

The monitor was in RGB mode. Re-connected the dell 3007WFP. Rebooted. 
Monitor stayed in RGB mode. Color was still "off" however I selected the 
sRGB profile and it looked correct. Never had to select sRGB before... 
but at least it looks good now.

Just to be clear, here's the process on how I got it to work on 
Mavericks:

1. I reinstalled a clean OS. Not sure if required.
2. Disconnect all monitors except the one you want modified.
3. execute the ruby patch above.
4. Copy the resultant directory to system/library/displays/overrides/
5. Reboot.
6. Ensure the new profile is being used, if the colours seem "off" use 
sRGB profile. The monitor will remain in RGB mode.
7. Reconnect additional monitors.

I tested that the monitor remains in RGB even when it's 
disconnected/reconnected, and it seems to. So should be good to go....

Hey Guys,
I have followed the instructions for the script here to get my new Dell 
S2740L 27" monitor to work properly with my new Mac Mini. The Ruby 
script seemed to execute nicely but where is the folder placed that it 
supposed to create? Is that put automatically under 
/Systems/Library/Displays/Overrides ?
So far there appears to be no change even after reboot.
Do I need to change something in the system settings under display 
profiles or something as well?
Please advise cause the lack of crisp display is getting to my nervs.
Thanks in advance
Thomas

In my case of Mavericks upgrade, I have to remove the display profile 
and then the patch would work. otherwise, my external monitor is not 
recognized by my MBP.

cd /Library/ColorSync/Profiles/Displays/
sudo rm DELL\ U2713H-F0416116-5694-ABA3-1ADB-6E3866AF2A94.icc

After upgrading to Mavericks, i just have to reapply the patch and it's 
working again.
Many thanks for this very helpful solution.

Just dropping a note that placing the original attached files in the 
/Overrides directory worked for me on a Dell U2713 and a 15" retina MBP 
experiencing a resolution limit after upgrading to Mavericks. 
Previously it was running fine at 2560x1440, but the OS upgrade left it 
limited to 1920x1080 max.

I don't see the ghosting that some discuss above, and I was able to dial 
the colors in nicely with a combination of hardware settings and a new 
custom Colorsync profile.

Many thanks for the easy fix!

i've been using the script w/ my two u2713h displays on my rmbp w/ mDP 
and out of curiosity attempted to plug a u2713h in via HDMI and was 
pleasantly surprised that I got 1440p in mavericks with it (read that it 
couldn't be done with Mountain Lion)... however, it was using YCbCr, so 
I tried the script with it plugged in via hdmi and it generated an a091 
instead of a092 file, and I was optimistic...  but when rebooting with 
that override, colors looked okay but the max screen resolution was 
1080p.... removed the profile and rebooted and back to 1440p over hdmi 
/shrug

Im not technical at all but love photo and would like to get my dell 
monito and mac book pro to work! Could someone explain for a very stupid 
person what needs to be done and how. Is it the zip file that should be 
moved somewhere? Do I need to change anything in the text?

Per

On mavericks switching which port the cable was plugged into fixed the 
issue where my monitor was stuck in 1080p. Amazing.

Thanks Andreas and all that have contributed to this.

I'm trying this patch with the Dell U2413 but it doesn't seem to work.

Could you advise on how I might edit the patch to work with my monitor 
please?

I'm using a 15'' BMP late 2008, through miniDP to DP on the monitor.

Many thanks,

Sam

Thanks for the script! I used it to fix my Dell U2413 connected to a 
mid-2010 Mac Mini via HDMI.  (It's also problematic over DisplayPort, 
and fixed the same way with this script. DVI works fine, but I want to 
use the DVI input for something else.)

I've forked the script on GitHub and added a couple features I really 
wanted:
* Use the monitor name (taken from the EDID data) rather than the 
generic “Display with forced RGB mode”
* Multiple display support — patch the EDID for all connected displays, 
rather than just the first one. Obviously you only need to install the 
override file for the problematic display, not all of them.

It's available at https://gist.github.com/adaugherity/7435890

Hi All,

Just an FYI,  used this script on my ASUS PA279Q and PA249Q and it works 
perfectly....!

PS.  the Dell and ASUS and Samsung use the same LG AH-IPS Panel.

Darin

Hey,

I'm having also troubles with my rMBP 15'' and my Dell u2711. I tried to 
run your script but it still doesn't let me use the RGB mode. The 
monitor is also still recognized as TV.

Is there anything else what i could try?

The same here. Running the 2713h on the MacBook Air 2012 via DP. I am 
running the new Mavericks - does the patch work with the newest version?

Retina MacBook pro 15", Dell U2713HM, OS X 10.9.

Unfortunately forcing RGB doesn't solve the horrible ghosting my monitor 
shows. Scrolling is incredibly painful.

I have closed the lid of my MBP, run the ruby script, moved the folder 
to /System/Library/Displays/Overrides , restarted the machine with the 
lid closed. Still ghosting even if the monitor reports RGB input.

Suggestions?

I have run the script and it works fine on my 2011 MBP going to my HP 
Pavilion 23xi monitor. However, I'm experiencing some issues now with 
other TV's that I connect to. I'm not sure it is or isn't die to this 
script forcing RGB but, I would like to know how to reverse the script, 
delete or disable the changes it made to bring my Macbook back to stock. 
Any help?

@Ben: Are you sure the Dell shows the info about the mode in this menu? 
I thought the mode is being displayed in the Syste Settings > Monitor in 
MacOS. In my case it shows a TV as symbol for the Dell monitor where I 
thought it should display a monitor instead.

Thank you for your detailed procedure. I will check this later today, 
but I am not quite sure wether I am checking my success against the 
correct "validation" as explained above. Perhaps the mode is already 
correct and I should search for another issue for my ghosting issues ;-)