[mythtv-users] mythtv-users Digest, Vol 131, Issue 18

[Stephen Hocking]

>
> Message: 8
> Date: Fri, 7 Feb 2014 22:29:11 +1100
> From: Jean-Yves Avenard <jyavenard at gmail.com>
> To: Discussion about MythTV <mythtv-users at mythtv.org>
> Subject: Re: [mythtv-users] Code to convert Xfree86 modeline into an
>         18 byte DTD array?
> Message-ID:
>         <CANpj82JxswO8NueQOGwEvNYvzQVwFeZw2oRthv=
> AtuBFA68Jvw at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> On Friday, February 7, 2014, Stephen Hocking <stephen.hocking at gmail.com>
> wrote:
> >
> > Hi all,
> >
> > I'm trying to work around an Nvida bug that causes it to specify TV
> modes when the EDID has extension blocks. These TV modes introduce
> overscan, instead of using my carefully crafted 1920x1080 modelines that
> are pixel perfect. If I disable the extension blocks, I get the perfect
> picture, but it also gets rid of the EDID data that tells the card about
> the audio devices on the other end of the HDMI link.
> >
> > I am planning on crafting my own EDID which will replace the
> manufacturer's modelines with my own, bringing both the perfect picture and
> tasty HDMI sound. Unfortunately this is going to involve a fair amount of
> bit-banging, and although I have working code that goes from the DTD array
> to the modeline, it's a bit of a pain to reverse the process. Before I
> expend much skull sweat, has anyone else got a fragment of code that does
> this?
> >
> >    Stephen
>
>
> "Les solutions les meilleures sont souvent les plus simples"
>
>  Why bother?
>
> Simply disable ELD reading in nvidia drivers; then it doesn't matter
> what audio device you have on the other end and what it supports. Just
> configure myth to support whatever features your audio device
> supports.
>
> Add to etc/modprobe.d/whatever.conf the following options:
>
> options snd-hda-codec-hdmi static_hdmi_pcm=1
>
> BTW, you don't even need to override the EDID with a custom one, you
> can perfectly tell the nvidia drivers to ignore whichever data you
> want to ignore.
> It's all in the mythtv wiki there:
> http://www.mythtv.org/wiki/User_Manual:JudderFree
>
>
Well this would be terrific if it worked, but having just tried it, alas it
it does not (even after changing the - to _ in the modprobe config
options.)  And to think I gave up drinking for Feb....
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