[mythtv-users] Sharp 46' LCD, GF5200 and 1080 HD mode ?

[Jens.Peder.Terjesen at devoteam.com]

-----mythtv-users-bounces at mythtv.org wrote: -----


To: "Discussion about mythtv" <mythtv-users at mythtv.org>
From: "Tom Dexter" <digitalaudiorock at gmail.com>
Sent by: mythtv-users-bounces at mythtv.org
Date: 28-11-2007 23:20
Subject: Re: [mythtv-users] Sharp 46' LCD, GF5200 and 1080 HD mode ?

On Nov 28, 2007 1:07 PM, Blammo <blammo.doh at gmail.com> wrote:
> on Nov 28, 2007 4:22 AM, warpme <warpme at o2.pl> wrote:
> > Do somebody have experience with this LCD TV, GF5200 and driving it to
1080 HD modes ?
> > From NV forums I know there is some issues with proper driving  this TV
to 1080i.
> > Also, is it possible to drive it to 1080p ?
> > What is native matrix resolution in this TV: isn't it 1920x540 ?
>
> While I can't help with these questions, I can offer one suggestion:
> Upgrade the video card.
>
> in my experience, a card with slow DDR like the 5200 series cards,
> have a hard time (tearing) with the memory bandwidth involved in
> 1080i/1080p modes. Upgrading to an (nvidia) card with DDR2/DDR3 can
> help a lot.
>
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>

Are you sure that was your issue?  That's the first I've ever heard
that.  Everything I can recall ever reading indicated that the 5200
cards are perfectly fine for mythtv at HD resolutions.  I can't say
firsthand, as I have a GeForce 7100GS.  Since I needed PCI-e only
newer chipsets were an option for me.

Tom
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Hi.

I know for sure that it is a problem with pixel clock bandwidth on the DVI
connection for all 5x00 series cards, I think VGA is OK though.

At work I tried for a long time to get a 5700 series card to display the
native resolution of 1600x1200 on an LCD monitor.
By telling the driver to ignore EDID information I managed to get the card
to display at this resolution, but this resulted in pixel crawling and
flickering images.

Jens