4 Replies Latest reply: Apr 12, 2012 5:01 AM by nios
ChadTomkiss Level 1 Level 1
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)
  • Grant Bennet-Alder Level 9 Level 9
    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.
  • ChadTomkiss Level 1 Level 1
    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
  • Grant Bennet-Alder Level 9 Level 9
    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.
  • nios Level 1 Level 1

    Hi,

     

    I have the exact same problem. Did you find any way to resolve this issue ?

     

    Thanks.