[mythtv-users] DVI-D/HD video card recommendation

Jake Thompson jake at jakethompson.com
Tue Jan 23 14:19:49 UTC 2007

As far as I understand DVI pushes analog and digital over a DVI-I Cable,
certain pins are used for certain signals.

That being said, I have a 7300GS the is connected with a DVI-D to HDMI cable
and is playing 1080p(1920x1080) just fine.  As far as I can tell with the
Specs online, it was a driver issue that prevented this resolution when the
cards first came out, but that is no longer the case.

On 1/23/07, Stroller <linux.luser at myrealbox.com> wrote:
> On 23 Jan 2007, at 04:07, Justin Moore wrote:
> ...
> > I realize that.  My question was
> >
> >>> P.S. Under linux, how would I check to see if the card was sending a
> >>> DVI-D signal as opposed to a DVI-A signal (all the cards I've
> >>> seen have
> >>> DVI-I output).
> >
> > Is there a flag I need to set when loading the kernel module to
> > force to
> > DVI-D output?
> And a very good question it is, too.
> I'm afraid I'm not able to answer, so I'm just posting to (bump your
> thread and) ask that if you find out elsewhere can you post back
> here, please?
> > I'd like to ... try and force the card
> > into DVI-D mode.
> >
> > There's also the issue as to whether or not a $30-$50 card can push
> > 720p/1080i over a DVI-D link.
> I've read posts on http://www.avforums.com from people saying they're
> using dual-link cards (under Windows) to drive their 1920 x 1080
> panels, but I'm not clear if this is actually necessary. I know
> nothing about dual-link, but I don't see how it should be necessary
> if a Blue-Ray or HD-DVD player can connect with just a regular HDMI
> cable. I'd love to know more.
> > From what I've seen on several
> > manufacturer's websites there are different maximum resolutions
> > depending on whether it's an analog or digital signal it's
> > pushing.  For
> > example, it looks like anything short of a 7600GT can't do 1080p in
> > digital mode, but the 7600GT and up can do 1080p.  I'd just like to
> > know
> > whether or not this is the case and (if so) where the similar line is
> > for 1080i.
> I have the impression that I've seen higher specifications advertised
> for VGA output than for DVI, but that seems quite illogical to me.
> Stroller.
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