[mythtv-users] HDMI & the elimination of customised modelines for 480i, 480p, 720p, 1080i and 1080p

[James Buckley]

On 04/06/07, Steven Adeff <adeffs.mythtv at gmail.com> wrote:
>
> On 6/4/07, Mark Kendall <mark.kendall at gmail.com> wrote:
> > On 6/4/07, James Buckley <xanium4332 at googlemail.com> wrote:
> > > I'll take the lack of response to this question that the info is
> probably
> > > wrong/inaccurate?
> >
> > I think it's probably because it wasn't entirely clear what you were
> asking :)
>
> yups.


Hmm, okay forget that question then...


> > Alternatively, I'm wondering whether HDMI capable STBs and DVD players
> also
> > > calculate the (equivalent) modeline based on the TV's EDID info, or
> just use
> > > some inbuilt timing information for the common formats (720p, 1080i,
> 1080p).
> > > Anyone know anything about this, or have some standard HD modelines
> that
> > > should work on most HDMI inputs.
>
>
> most set top boxes are dumb in this regard, they don't use the EDID at
> all requiring the user to properly set them up. EDID is basically
> useless for most TV's as the values are wrong. Some are correct
> though, and some companies have even fixed the wrong EDID information
> in firmware updates.
>
> Your best bet is to use one of the modeline database standard
> modelines, or the NVidia modepool (both explain in the mythtv wiki).
> As these use the standard ATSC settings and should work on all TV's.
> You may need to disable usage of some parts of the EDID detection to
> get them to work properly.
>
> > If you run x with verbose logging (can't remember the command line
> > option off the top of my head), it will give you endless detail on
> > what your monitor returns as acceptable modelines and (most
> > importantly) the description it uses for those in-built modelines. So
> > for example, my Xorg/monitor combination has an 'inbuilt' modeline
> > that it calls 1920x1080_100i - for PAL 1080i.

>


You have a monitor capable of 100Hz, wow!

> STB's appear to query the display for supported input formats. My
> > hidef freeview box (now useless...) reports the supported resolutions
> > correctly.
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