[mythtvnz] Channel change stability issues with MythTV and VDPAU in NZ

[Jean-Yves Avenard]

Hi

2009/6/1 Robert (MythTV) <mythtv at isolutions.co.nz>:
> I can also confirm this exact same issues on my MythTV Boxes as well. (JYA
> testing repo)
> Running 64 bit (not 32 bit)
> A). 2Gb RAM, 200Gb system disk, 400Gb dedicated recording disk.
> B). 8Gb RAM, 400Gb system disk, 400Gb dedicated recording disk.
>
> Test environments
> * Ubuntu 9.04 64 bit (GNOME with Compiz/Composite enabled)
> * nVidia VDPAU 185.19
> * mythtv - 0.21.0+fixes-svn20649-jya-debug-0ubuntu0
> * mythtv - 0.21.0+fixes-20649-openglvdpau-debug-0ubuntu2

Well, you have a problem here ...

ubuntu2 is an Ubuntu 8.10 package.

It goes like this:
ubuntuX, where X :
0 = jaunty (9.04)
1 = hardy (8.04)
2 = intrepid (8.10)
then it goes modulus 3

So I'm surprised you could run it on a 9.04 system ; and if you did,
no wonder it's not stable...

>
> RE: 1). Quick channel changes on my Nova-T 500 DVB-T cause the front end to
> crash. This is especially easy to do when changing from DVB-T (i.e. TV3) to
> my Leadtek Winfast 2000XP (analog for Prime). This almost always appears to
> cause the front-end to crash. It is repeatable, but does not happen every
> time though.
>
> Additionally, changing channels on the Winfast can now lead to a full system
> lockup, which did not occur before. i.e. there is no terminal, no mouse
> movement, sound locked in repeated loop - true machine lockup, only reset
> button works. Speed of the channel change in this second case is not needed,
> so this may be (probably is) a different bug.

Did you enable realtime priority thread ? I've seen lockup with compiz
and realitme priority threa enabled: lock the frontend completely for
30s+ at a time

>
> RE: 2). I can confirm this happening as well. Speed of channel change is not
> an issue for me. I could have been watching a channel (Live TV) for a while,
> then change channel, and it fails. After this is appears that the card is
> still 'in use' and entirely unavailable. Restarting mythbackend,
> mythfrontend, or anything else I've tried does not free up the card again.
> Rebooting the machine (power off) appears to be the only solution - which
> makes me think it could be a firmware loading issue, or something in the
> Nova-T driver itself.

Sounds more like a driver issue than a myth issue

JY