[mythtv-users] I killed XvMC with a little test. Help!

[jb17bsome at bellsouth.net]

On Wed, 11 Feb 2009 23:01:17 -0800
Allen Edwards <allen.p.edwards at gmail.com> wrote:

> On Wed, Feb 11, 2009 at 9:23 PM,  <jedynamic at bellsouth.net> wrote:
> > On Wed, 11 Feb 2009 20:45:00 -0800
> > Allen Edwards <allen.p.edwards at gmail.com> wrote:
> >
> >> My aux FE was just fine when and ran envyng to updage the nvidia
> >> driver. Now any recorded show that requires XvMC to play (HD shows)
> >> takes mythfrontend to 100% and a black screen with mythfrontend
> >> locked up. mythfrontend.log shows this as the last thing:
> >>
> >> 2009-02-11 20:20:22.115 TV: Changing from None to
> >> WatchingPreRecorded 2009-02-11 20:20:22.120 Failed to approve
> >> 'none' deinterlacer 2009-02-11 20:20:22.121 Couldn't load
> >> deinterlace filter 2009-02-11 20:20:22.121 Realtime priority would
> >> require SUID as root. 2009-02-11 20:20:22.143 XvMC: picture
> >> structure FRAME
> >>
> >> If I change from CPU--, which uses XvMC to SLIM, the show will play
> >> but not smoothly so it is unwatchable.  Thus it isn't the
> >> recording. I have tried several recordings.  SD recordings play
> >> fine.  You will notice from the log that I turned deinterlacing to
> >> "none" to simplify the problem.  It didn't help.  I tried putting
> >> in a new video card, a 5200 and updated the driver again and it
> >> acts the same.  I removed the driver and used the nvidia-xconfig
> >> to install it and it acts the same.  Nothing helps.
> >>
> >> P4 2.4GHz
> >> Nvidia 5200 AGP
> >> RGB monitor
> >> Mythbuntu 8.04
> >> branches/release-0-21-fixes version 19878
> >>
> >> I don't know what happened.  I was just trying to verify some
> >> things for the wiki I am writing and now my system is broken.
> >>
> >> I posted some of this within another thread but thought it better
> >> to start a new one.
> >>
> >> Allen
> > What does mplayer do?
> > mplayer -vo xvmc -vc ffmpeg12mc -ao null somefile.mpg
> >
> > Does the cpu go to 100%?
> >
> > If so then try disabling agp in your xorg.conf:
> > Option "NvAGP" "0"
> >
> 
> mplayer does the same thing as myth.  CPU as close to 100% as the
> other processes allow, black screen, unresponsive, locked up.  I could
> not even kill it, had to restart X.
> 
> I added Option "NvAGP" "0" to the video card device in xorg.conf and
> it works, at least on one file that previously did not work and it is
> playing in XvMC with about 40% CPU, which seems good.
> 
> So, what do you think happened?  I did not change my xorg.conf file
> after the upgrade.
> 
> Allen
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I am sure it is a bug in the nvidia driver.  For some reason, nvidia
broke agp xvmc context init in recent drivers (I am not sure
of the exact version).