On Mon, Mar 08, 2010 at 10:49:25PM +0200, Dotan Cohen wrote: > > Check this pic: > > http://www.playtool.com/pages/dvicompat/sldldvi.jpg > > > > I had no idea it was such a mess! Three different types of DVI?!? One > for D, one for V, one for I?!?
As you can see from the pictures, the pinout variations¹ allow different subsets of the pins to be used. Typically the female end on your graphics card will be DVI-I and support all options, while the cable from the display will have just the subset of the pins it needs. For example, if you connect a digital monitor to a DVI-I port it *can't* use analogue signalling: it's physically missing the C1-C4 R/G/B/HSync lines. Typically these would only be found in a DVI->VGA converter or cable. Just checked my monitors' cables and they are all DVI-D; if it's an LCD, it probably won't even have the ability to do the analogue to digital conversion, even if the connector didn't physically prevent it. There may be weird monitors out there that accept both digital and analogue inputs over DVI, but I've never seen one. If you are suffering from such a situation, using a DVI-D cable would prevent any use of analogue signalling. The only other variations are dual link (just an extra 6 pins), and DVI-A for analogue only (I've never ever seen this one, and this is just the C1-C4 pins and 3 data pins removed). Regards, Roger ¹ http://www.interfacebus.com/Design_Connector_Digital_Visual_Interface_DVI_Bus.html -- .''`. Roger Leigh : :' : Debian GNU/Linux http://people.debian.org/~rleigh/ `. `' Printing on GNU/Linux? http://gutenprint.sourceforge.net/ `- GPG Public Key: 0x25BFB848 Please GPG sign your mail.
signature.asc
Description: Digital signature
