Yes, people need to be aware that having a DVI connector alone
isn't enough to ensure that you can run a particular panel. While
many cards boast high analog pixel clocks, TMDS clocks are quite a
different matter. High bandwidth TMDS controllers are complicated
to make and are typically not available integrated into the
graphics chips. Most of the high clock TMDS controllers are external
chips made by Silicon Image.
Mark.
On 17 Mar 2003, Veit Wahlich wrote:
> Hi!
>
> I ran into the same trap - but sometimes it worked but was very "snowy".
> I was shocked when I read that G550 simply does not support DVI-D at
> this resolution:
>
> DVI output
> * Supports cutting-edge digital flat panels with resolutions up to
> 1280 x 1024 (main display)
> (http://www.matrox.com/mga/products/mill_g550/features.cfm)
>
> I bought G550 because of its signal quality - now, as with DVI-D
> analogue signals do no longer matter, I am running an Asus V8420 (GF4
> Ti4200) that supports DVI-D at 1600x1200 well.
>
> Regards,
> // Veit
>
>
> Am Mon, 2003-03-17 um 23.07 schrieb Ken Marx:
> > Hi,
> >
> > FreeBSD 4.7-STABLE, Xfree86 4.3.
> > Matrox G550, Iiyama AU4831D (DVI cable).
> >
> > Problem: X comes up with seemingly little/no
> > complaints. But screen is blank (with "no
> > signal digital port" message) in native
> > 1600x1200 resolution.
> >
> > I can successfully C-A-+ to 1280x1024
> > and other modes.
> >
> > Any help on getting 1600x1200 working?
> >
> > Config/log attached.
> >
> > thanks,
> > k
>
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