Difference in color between HDMI vs MDP to HDMI on new Mini

docprego

macrumors 65816
Original poster
Jun 12, 2007
1,201
61
Henderson, NV
I hooked my new Mini up tonight to my dual displays, one via HDMI and the other via a MDP to HDMI adapter to HDMI. I immediately noticed that one of the screens was darker than the other. Is this typical behavior between these 2 ports?

In case it matters, my Mini is the new base model with integrated graphics.
 

DustinT

macrumors 68000
Feb 26, 2011
1,556
0
Any difference in color you are detecting is not a results of which video interface you are using. They will all produce an identical signal..

I suspect your monitor has a different setting depending on which input is in use. Check that first.
 

docprego

macrumors 65816
Original poster
Jun 12, 2007
1,201
61
Henderson, NV
Any difference in color you are detecting is not a results of which video interface you are using. They will all produce an identical signal..

I suspect your monitor has a different setting depending on which input is in use. Check that first.
The monitors are configured identically. I had them hooked up to a PC previously and did not experience this.
 

qcmacmini

macrumors 6502
Oct 26, 2014
296
1
The Netherlands
I hooked my new Mini up tonight to my dual displays, one via HDMI and the other via a MDP to HDMI adapter to HDMI. I immediately noticed that one of the screens was darker than the other. Is this typical behavior between these 2 ports?

In case it matters, my Mini is the new base model with integrated graphics.
Bit of a thread dig, but I just switched from using mini display port to HDMI with my Dell U2414H and also noticed this.

Greys are a little darker over HDMI.

I checked all settings are identical, and I have forced RGB over HDMI.

Anyone else notice this?

I have a 2012 Mac mini.
 

xraydoc

macrumors demi-god
Oct 9, 2005
7,698
1,860
192.168.1.1
For a brief couple of days, i had a 2011 mini with two identical HP Z24i displays. One connected via DisplayPort (mDP-to-DP) and the other connected via Apple's HDMI to DVI adapter. Both demonstrated equal calibration/brightness/greyscale.

I'm now using a 2014 mini with the same two monitors, each connected to separate TB/mDP ports via mDP-to-DP cables. Still both displays show equal calibration.

Perhaps it's a quirk of the adapter you're using? Do you have another you can try or borrow?
 

qcmacmini

macrumors 6502
Oct 26, 2014
296
1
The Netherlands
For a brief couple of days, i had a 2011 mini with two identical HP Z24i displays. One connected via DisplayPort (mDP-to-DP) and the other connected via Apple's HDMI to DVI adapter. Both demonstrated equal calibration/brightness/greyscale.

I'm now using a 2014 mini with the same two monitors, each connected to separate TB/mDP ports via mDP-to-DP cable. Still both displays show equal calibration.

Perhaps it's a quirk of the adapter you're using? Do you have another you can try or borrow?
I have the HDMI to DVI adapter, but my monitor doesn't have DVI.

I'm using an Apple HDMI cable, the only other cable I have is mDP to DP.

One theory I have is that I am now using the generic drivers from the patch-edid.rb file, it's not recognising my monitor anymore. Maybe that's causing it?
 

casperes1996

macrumors 601
Jan 26, 2014
4,901
2,766
Horsens, Denmark
I have the HDMI to DVI adapter, but my monitor doesn't have DVI.

I'm using an Apple HDMI cable, the only other cable I have is mDP to DP.

One theory I have is that I am now using the generic drivers from the patch-edid.rb file, it's not recognising my monitor anymore. Maybe that's causing it?
Just to be sure, are they both set to use the same display profile in System Preferences under Displays?
 

qcmacmini

macrumors 6502
Oct 26, 2014
296
1
The Netherlands
Just to be sure, are they both set to use the same display profile in System Preferences under Displays?
Yes, same display profiles. They loaded automatically when the display was connected under mDP.

With the RGB override in place, OS X can't see the monitor information anymore though.

Just wondering if there are settings behind the display profile that influence what you see. For example the RGB setting has nothing to do with the display profile.
 

newellj

macrumors 604
Oct 15, 2014
7,748
2,629
East of Eden
For a brief couple of days, i had a 2011 mini with two identical HP Z24i displays. One connected via DisplayPort (mDP-to-DP) and the other connected via Apple's HDMI to DVI adapter. Both demonstrated equal calibration/brightness/greyscale.

I'm now using a 2014 mini with the same two monitors, each connected to separate TB/mDP ports via mDP-to-DP cables. Still both displays show equal calibration.

Perhaps it's a quirk of the adapter you're using? Do you have another you can try or borrow?
I second this. I have two Dell 2410 displays on this Mini, one HDMI-DVI and the other MDP/TB-DP. There is no visible difference in brightness, saturation or color rendition.
 

qcmacmini

macrumors 6502
Oct 26, 2014
296
1
The Netherlands
I second this. I have two Dell 2410 displays on this Mini, one HDMI-DVI and the other MDP/TB-DP. There is no visible difference in brightness, saturation or color rendition.
It could be my eyes fooling me, because originally I was on YPbPr colours.

I guess the true test will be when I get my second monitor.
 
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