MythTV broken after a recent update...

eccerr0r · Advocate Joined: 01 Jul 2004 Posts: 2994 Location: USA

I think I updated xorg-server-1.11, xorg-drivers-1.11, and xf86-video-intel-2.17 (amd64-stable) recently and now mythtv (mythfrontend) seems to cause the video driver to hang. Anyone seen this happen?

Trying to back off to xf86-video-intel-2.15 didn't help...trying an older xorg-server now...

Mythtv is using a cx23885 card (hauppauge hvr-1250 model 1196). Intel G965 onboard video.
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Jaglover · Posted: Sat Jan 14, 2012 9:21 pm Post subject:

What version of MythTV. Intel N10 Integrated Graphics Controller, intel 2.17.0-r3, mythtv 0.24.1 works. Backend is in a different box.
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eccerr0r · Advocate Joined: 01 Jul 2004 Posts: 2994 Location: USA

Backend on same machine of course...

media-tv/mythtv-0.23.1_p27077 ... not sure if this in itself was an update or not.

Trying an -e emerge to see if it cleans anything up. Just very weird that an update seemed to have broke things...
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Jaglover · Posted: Sun Jan 15, 2012 2:20 am Post subject:

0.24.1 is stable (not in Gentoo), I'd consider upgrade, 0.23 may be just too old for current Xorg.
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eccerr0r · Advocate Joined: 01 Jul 2004 Posts: 2994 Location: USA

Allright, will try to use the ebuild for 0.24.1... Rebuilding 0.23 didn't help, might be time to "unstable" it.

[Update]

Nope, still broken but by another mechanism.

Now I get this blue screen every time I try to watch a recording or watch live tv. Audio appears to work.

It looks like the backend is working. It's recording stuff just fine -- I can play back the recorded files using mplayer, but mplayer I have to hardcode the output driver -vo. Looks like the default output channel x11/xv is broken perhaps, probably same problem with mythfrontend?

hmm... trying an -e world now...

[Update 2]

The -e world made it a bit better, I can watch TV once more, but mythtv-0.24.1 is pretty unstable for me... crashes and/or hangs for a few seconds frequently, sometimes does not update the screen when it should, etc....

No wonder why it's ~ ...
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eccerr0r · Advocate Joined: 01 Jul 2004 Posts: 2994 Location: USA

It looks like there's a problem with the graphics subsystem.

The DRM or something with the graphics routines is causing my G965 to crash. After it crashes, 3D no longer works... It eventually can take down the whole system (!) ... not sure if it's a hardware or software issue but seems multiple people are seeing the issue by a cursory Google search.

And nice... I forgot to rc-update add syslog-ng default... at least it's pretty easy to crash it again...
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Jaglover · Posted: Wed Jan 25, 2012 3:38 pm Post subject:

Out of curiosity, do you have played with sna flag?
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eccerr0r · Advocate Joined: 01 Jul 2004 Posts: 2994 Location: USA

No, I'm not using SNA (thought that was Sandybridge stuff which I clearly don't have...) Might well try it, seems like it says that it has value to older chipsets and not just core i7...
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Jaglover · Posted: Wed Jan 25, 2012 5:43 pm Post subject:

Here's the SNA thread (for those who haven't read it yet): http://forums.gentoo.org/viewtopic-t-890280-highlight-.html
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eccerr0r · Advocate Joined: 01 Jul 2004 Posts: 2994 Location: USA

Interesting... Guess I wasn't running into the issue or I need to back up a version... Grr.
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eccerr0r · Advocate Joined: 01 Jul 2004 Posts: 2994 Location: USA

New data.... Looks like playback seems ok but X11/MythTV will crash, dumping back to the login screen (using Gnome GDM) when playing back (and downconverting) a 1080p stream to 720p.
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Etal · Veteran Joined: 15 Jul 2005 Posts: 1633

Are you running the version from portage or from MythTV's overlay?
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eccerr0r · Advocate Joined: 01 Jul 2004 Posts: 2994 Location: USA

Portage. I would hope it would be somewhat stable...
May need to try some other overlay....
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eccerr0r · Advocate Joined: 01 Jul 2004 Posts: 2994 Location: USA

I think I found the smoking gun after some random readings.

Apparently mythtv uses the CPU to decode SD streams, and xvmc for HD streams? Does this sound familiar?

When xvmc is run, it will then crash the X server? I had xvmc use flag turned on for mythtv, this might have been the reason why it crashes.

Anyone have xvmc running with MythTV+Intel graphics? I disabled xvmc as a workaround and it uses quite a bit more CPU to playback than to record...

Jaglover · Posted: Thu Mar 29, 2012 8:31 pm Post subject:

I'm using 0.25-trunk myself. There is no XvMC any more (in 0.25), did you try VAAPI?
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eccerr0r · Advocate Joined: 01 Jul 2004 Posts: 2994 Location: USA

Unfortunately I don't think vaapi is an option for 0.24... or is it?

Well one would think that a Core2 Duo E6700 should be fast enough... it is for the most part.
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Etal · Veteran Joined: 15 Jul 2005 Posts: 1633

I think there's an option to choose which backend to use for which resolution. (At least that's my understanding of it)

It's located in Setup → TV Settings → Playback
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Jaglover · Posted: Sun Apr 01, 2012 9:13 am Post subject:

eccerr0r · Advocate Joined: 01 Jul 2004 Posts: 2994 Location: USA

We'll see... Then hopefully I don't need to use a "huge" Core2Duo for the frontend and offload some to the chipset graphics.

Then again, a Core2Duo isn't the fastest processor out there anymore... it is the third fastest (of the zillions of computers I have) in my house currently, I really should use one of the crappier machines to play video... Though it is in a half height microatx case that fits well underneath the TV...
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depontius · Advocate Joined: 05 May 2004 Posts: 2156

Jaglover · Posted: Mon Apr 02, 2012 8:54 pm Post subject:

0.25 has been around, yes, as a beta. 0.25 as a version recommended to the end user is not out yet.

I'm currently building by hand. I know, everyone says 'boo' now, I should use an ebuild and if there is none I like I should write my own. Using prefix /usr/local makes it manageable enough for me right now.
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depontius · Advocate Joined: 05 May 2004 Posts: 2156

There are also upstream ebuilds for MythTV - I got instructions somewhere here on the forums on how to install it, because it's not a regular overlay. But from the upstream ebuilds, mythtv-0.25_rc20120329 is available. I'm currently running mythtv-0.24.2_p20120315 from the upstream ebuilds.
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