[mythtv-users] More XvMC data points

Douglas Wagner douglasw0 at gmail.com
Sun Dec 3 07:25:09 UTC 2006


Mike, I forget if this was in another thread or not that I posted, but to
get your modes to work on your TV you MIGHT have to disable EDID checking
completely.  I know on my TV unless I completely disable EDID the ONLY valid
modes NVidia will process are the ones reported by EDID.

--Douglas Wagner

On 12/1/06, Michael Tiller <michael.tiller at gmail.com> wrote:
>
> On 12/1/06, Patrick Ouellette <pat at flying-gecko.net> wrote:
> >
> > On Fri, Dec 01, 2006 at 12:07:11PM -0500, Michael Tiller wrote:
> > >
> > > built MythTV from SVN recently and specifically looked and it said
> > something
> > > like "OpenGL Sync: Disabled" or some such thing.  That is the correct
> > > setting right?  (i.e. the default setting)
> >
> > I was told to try turning it on and it seems to work for me.
>
>
> I'm just starting wonder how many of these claims have actually been
> substantiated. :-)  So many XvMC related issues seem to be "try standing on
> your head and rubbing your stomach".  I'm always left wondering "Are you
> sure this makes any difference?" :-)
>
> > using the latest NVidia driver
> > >
> > > I've got a 440 MX using the 8776 driver.
> >
> > 9629 driver.  Check the AGP settings in the xorg.conf to be sure you age
> > really getting full speed out of the AGP.
>
>
> It's not an AGP card.
>
> Partially, if you enable the OpenGL vblank at compile time, you get a
> > check box in the TV Playback setup screen too (same screen that sets
> > "use video as timebase" I think).
>
>
> I get that setting even without enable OpenGL vsync.
>
> > soundcard buffer settings
> > >
> > >
> > > By this do you mean turn on extra audio buffering during playback? (in
> > the
> > > Playback settings on the front end)
> >
> > You can try it - for my system it helps to have it turned on with the
> > 9629 video driver, but off with the 8776 driver (don't know why).
> >
> > I will say XvMC output really, really, really, really sucked on my
> > system before 8776, and 9629 is even better.
>
>
> I'll have to try 9629 just to cover all the bases but I'm not optimistic.
>
> > and dot clock in my modeline have significantly improved my XvMC output.
> > >
> > >
> > > I'm lost here.  I've tried adding my own modelines but it always
> > complains
> > > they aren't valid
>
>
>
>
> There is a modeline calculator at
> > http://xtiming.sourceforge.net/cgi-bin/xtiming.pl
> >
> > Something around this should be close:
> >
> > Modeline "720x480 at 60i" 12.60 720 752 792 824 480 491 494 505 interlace
>
>
> I still get:
>
> (II) NVIDIA(0): Assigned Display Device: TV-0
> (WW) NVIDIA(0): No valid modes for "1024x768_60"; removing.
> (WW) NVIDIA(0): No valid modes for "720x480 at 60i"; removing.
> (WW) NVIDIA(0): No valid modes for "720x480_60"; removing.
> (WW) NVIDIA(0): No valid modes for "NTSC_60i"; removing.
> (II) NVIDIA(0): Validated modes:
> (II) NVIDIA(0):     "1024x768"
> (II) NVIDIA(0):     "720x480"
> (II) NVIDIA(0): Virtual screen size determined to be 1024 x 768
>
> I'm putting the Modeline here:
>
> Section "Monitor"
> >         Identifier   "Monitor0"
> >         VendorName   "Monitor Vendor"
> >         ModelName    "27in Analog TV"
> >         HorizSync    30.0 - 50.0
> >         #VertRefresh  60.0 - 60.0
> >         Option       "dpms"
> >         Option       "UseEdidDpi" "FALSE"
> >         Option       "DPI" "100 x 100"
> >         ModeLine "NTSC_60i" 14.318 768 784 848 910 483 484 492 525
> > Interlace
> >         Modeline "720x480_60" 26.72  720 736 808 896  480 481 484 497
> > -HSync +Vsync
> >         Modeline "720x480 at 60i" 12.60 720 752 792 824 480 491 494 505
> > interlace
> > EndSection
> >
>
> ...is this the right place.  I notice that it names the device "TV-0".  Do
> I have to use the same name for my monitor?!?
>
>
>
> The calculator should be able to come up with something that works.  The
> > NVidia
> > driver restricts modelines depending on the output format and tv
> > standard.
> >
> > option "TVStandard" "NTSC-M"
> > Option "TVOutFormat" "SVIDEO"
>
>
> Exactly what I have.
>
> or change SVIDEO to COMPOSITE for composite out.
> >
> > If you are using an external converter, you should be able to get a
> > wider variety of modelines to work.
>
>
> I'm thinking I'm doing something fundamentally wrong since no Modeline I
> put in the file seems to work?!?
>
> DISCALIMER: I run the SVN-HEAD version of Myth, YMMV for release
> > versions.
>
>
> I'm running the fixes branch from SVN.
>
> Pat
>
>
> Thanks for all the help.
>
> --
> Mike
>
>
>
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>
>
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