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Do DVI - VGA Adaptors make the slightest difference anyway?


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#1
chrismix

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My card's got a VGA and a DVI output. The DVI is the one that goes dead, also the DVI out has one of those DVI-VGA adaptors on it.

Some people have mentioned in their posts about success or failure with a particular Natit and if they are using such an adaptor or not; but does anyone know if it actually makes a difference? I.E, would the Hackintosh even 'know' that you've got an adaptor?

Has anyone ever found that their display works with the adaptor, but won't without it?

#2
aNILEator

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not a blind difference to me when using my X1600, i still can't get a decent display

#3
consolation

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The adaptor is just a pass through for the vga signal. Strictly speaking the DVI ports are DVI-i which contain the analogue DVI-a (vga) and digital DVI-d signal. All that the adapter does is use the pins that carry the vga signal, same as if you would have an ordinary vga port.

#4
DiaboliK

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maybe this means osx is using the dvi ports as vga ports, ingnoring the other pins in dvi mode.
just an assumption, dont quote me on it.

Edited by DiaboliK, 17 February 2007 - 05:22 AM.


#5
consolation

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maybe this means osx is using the dvi ports as vga ports, ingnoring the other pins in dvi mode.
just an assumption, dont quote me on it.


All but the most expensive cards use internal TMDS nowadays. I suspect the problem is with os X failing to initialize it properly.

Edited by consolation, 17 February 2007 - 07:42 AM.


#6
niek!

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yes youve to add EDID ids somewhere for the dvi, but i dont know where...

#7
consolation

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yes youve to add EDID ids somewhere for the dvi, but i dont know where...



Depends on your card / method. Natit/Titan are pretty good at making the card get the edids automatically (afaik, works for me anyhow). If that doesn't work for you add them to the kext that's responsible for your display initializing. I think the problem is that os X expects EFI to init the card but instead gets BIOS sitting with one finger up its arse.

#8
niek!

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do you have to add the edid using plist editor or something? or can it be done in terminal in

#9
consolation

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Either-Or, plist editor is easier to use as it takes care of formating for you. But you can use nano or even text edit (if you are careful).

#10
niek!

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Either-Or, plist editor is easier to use as it takes care of formating for you. But you can use nano or even text edit (if you are careful).


so far no luck, i tried putting them everywhere but no luck... also plist editor changes the edid hex, dont know if thats a problem..

is it possible maybe someone can make an natit installer and make it so you can add an EDID when it installs?

#11
sp1ice69

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Yes - Couldn't get dual monitor for ages on natit neo installer (Geforce 7300 GS - JaS 10.4.8 intel SSE 3) on one dvi converter and one native vga outputs, as soon as i swapped the converter for a straight dvi cable, instant sucess ! Full dual monitor support.





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