What is the result of connecting a single link (DVI-D) video source to a dual link monitor?

Tom Buskey tom at buskey.name
Thu Oct 15 16:34:35 EDT 2009


On Wed, Oct 14, 2009 at 9:07 PM, Alex Hewitt <hewitt_tech at comcast.net>wrote:

>  Shawn O'Shea wrote:
>
> On Wed, Oct 14, 2009 at 5:37 PM, Alex Hewitt <hewitt_tech at comcast.net>wrote:
>
>> I'm trying to connect a new Mac Mini to a Barco monitor. The Barco
>> monitor expects a dual link video source (2048 x 1536 /1536 x 2048) but
>> the Mini is outputing single link DVI-D.  The Mac  sees the monitor as
>> having a resolution of 1280x1024. Apple makes a dual link DVI adapter
>> but I don't know if this will allow the Barco to work properly. Anyone
>> have any experience with this kind of setup?
>>
>>
> Single-link DVI has less pins/wires and maxes out at 1920x1200 resolution.
> For higher resolutions, you need the extra wires and can go to 2560x1600.
> You need to also make sure that the DVI cable you are using is dual link as
> well.
> Pictures of connector types:
>
> http://www.interfacebus.com/Design_Connector_Digital_Visual_Interface_DVI_Bus.html
> Discussion of single vs dual with resolution information:
> "WHAT ARE SINGLE AND DUAL LINKS ?" section of
> http://www.datapro.net/techinfo/dvi_info.html
>
> -Shawn
>
>
>> The Mac Pro does have a dual link video but I'm not sure if that system
>> would also have the same problem. The Barco site only describes MS
>> Windows systems and provides drivers for the same.
>>
>> -Alex
>>
>> P.S. BTW, we did connect a Totoku 3MP display (2048x1536) which uses a
>> DVI-D connection and that display worked at full resolution.
>> _______________________________________________
>> gnhlug-discuss mailing list
>> gnhlug-discuss at mail.gnhlug.org
>> http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
>>
>
>  Thanks Shawn. Good pointers. There is something a bit odd about this
> though. The Totoku monitor is running at it's native resolution (2048x1536).
> The Mac gives me the full resolution as a choice in the display preferences.
> I'll look closely at the connector (miniPort to DVI-D) and see if it's
> actually dual link. The DVI-I dual link is definitely not working.
>
>
I have a Mac Mini (mid 2009) model.  From what I'm reading, that's what you
have and not an earlier model.  (refer to http://lowendmac.com)

This model has 2 video ports: 1 mini displayport and 1 mini DVI.  There is
no analog signal in them.  A mini DVI to DVI will be DVD-D output, not DVI-I
or DVI-A.

The svideo/composite adapter that apple sells will not work on this model
because there is no analog component.


I don't know if thiis helps your actual situation.  I had to buy a USB
powered VGA to svideo/composite converter (not just an adapter) to hook up
an old TV.  This generated an analog signal from a digital input.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.gnhlug.org/mailman/private/gnhlug-discuss/attachments/20091015/ac0bcaca/attachment-0001.html 


More information about the gnhlug-discuss mailing list