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User profile for user: ChadTomkiss
ChadTomkiss Author
User level: Level 1
0 points

Problem: Mini DisplayPort to DVI Adapter with Samsung Syncmaster 2033HD

Hi,

I am using the Mini DisplayPort to DVI Adapter to connect to a Samsung Syncmaster 2033HD

However, I get No Signal with DVI as the Source.

It works when plugged into the DVI slot of the Mac Pro.

Any help would be much appreciated.


Chad

Mac Pro, Mac OS X (10.6.6)

Posted on Mar 28, 2011 2:30 AM

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4 replies
User profile for user: Grant Bennet-Alder
Grant Bennet-Alder
User level: Level 10
127,693 points

Mar 28, 2011 4:51 AM in response to ChadTomkiss

DisplayPort and its variant Mini DisplayPort, use a new and different protocol for communicating with your display.

A properly-functioning adapter can request the DisplayPort use "Dual-Mode", which produces a good approximation of single-Link DVI/HDMI. This is good for resolutions up to 1920 wide, which would include your Samsung (1600 by 900).

Wider displays require a more expensive "active" "powered" converter, to convert DisplayPort to Dual-Link DVI.

So if the display works with a straight DVI connection, but not a DisplayPort adaptation to "Dual Mode" DVI the weak link appears to be the adapter, but you cannot quite rule out the display card.
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User profile for user: ChadTomkiss
ChadTomkiss Author
User level: Level 1
0 points

Mar 28, 2011 6:05 AM in response to Grant Bennet-Alder

Hi Grant,

I took both the cable and the mini display port to an Apple store for testing, and they said that they are working fine.

The fact that the display works fine when using the DVI slot on the Mac Pro suggests that the Mini Display Port isn't sending the right signal?

The connection says DVI-D on the monitor if that helps.

Thanks.


Chad
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User profile for user: Grant Bennet-Alder
Grant Bennet-Alder
User level: Level 10
127,693 points

Mar 28, 2011 6:34 AM in response to ChadTomkiss

The connection says DVI-D on the monitor if that helps.


The DVI port on the computer offers both Digital (what most folks think of as "real" DVI) and Analog (VGA) signals on different pins on its connector. It is referred to as DVI-I (think "Inclusive" contains both).

DVI-D simply says that is ignores the redundant VGA signal.
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Problem: Mini DisplayPort to DVI Adapter with Samsung Syncmaster 2033HD

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