[mythtv-users] XvMC Problem and Question

[Brian Wood]

On Feb 9, 2006, at 9:46 PM, Chad wrote:

> On 2/9/06, Brian Wood <beww at beww.org> wrote:
>> Trying to get XvMC working with 0.18.1
>>
>> GeForce FX 5700VE card w/256MB
>>
>> vNidia 1.0.7676 drivers installed
>>
>> mythTV 0.18.1 with XvMC compiled in (I have the XvMC checkbox checked
>> in the UI)
>> (ldd mythfrontend shows the XvMC library dependency, and it is
>> fulfilled, but possibly incorrectly)
>>
>> "load glx" included in X config file, glxinfo shows OpenGL loaded
>> properly
>>
>> Attempt to watch live TV results in "unable to initialize video,
>> Unable to create XvMC Context, return status: 11 Bad Alloc"
>>
>> I'm pretty sure I have a library problem caused by the fact that I
>> initially installed the 8178 drivers from nVidia's installer, and
>> switched to 7676 using Gentoo's Portage system. I already found a
>> link in /usr/lib that linked to an 8178 version, not 7676, and fixed
>> that, but nothing in mythfrontend seems to be using any of the nVidia
>> libs.
>>
>> Could someone using the nVidia drivers tell me what /usr/lib/
>> libXvMC.so and/or /usr/lib/libXvMC.so.1 are linked to? Also, do you
>> have an /etc/X11/XvMCConfig file, and if so what does it contain?
>> (should be only one line if it exists).
>>
>> Also, running ldd on the mythfrontend executable, what is libXvMC.so.
>> 1 fullfilled by?
>>
>> This would help me out immensely, much thanks.
>>
>
>
> I recently was in a similar situation, but was trying to just
> completely eliminate the fact that I ever tainted my kernel with
> anything from nvidia.  What a problem that caused!  I completely
> removed nvidia anything, removed xorg, recompiled and reinstalled
> xorg, but still had a few traces of nvidia crap around :(
>
> I eventually just grepped my system for anything looking suspicous,
> removed it, reinstalled quite a bit of things to make sure they were
> no longer being attached to anything nvidia, and finally was able to
> get a truly nvidia-free system working.  About 20 minutes later, I
> reinstalled the nvidia drivers :D
>
> Anyway, back to your question.  I'd personally just remove (emerge -C
> nvidia-kernel nvidia-glx) the emerged nvidia drivers, and then using
> the nvidia installer, remove the old (new actually) one as well.
> Then, re-emerge the older version (emerge nvidia-kernel nvidia-glx)
> and then re-install/emerge mythtv to make sure it's all setup and
> linked correctly.
>
> Directly answering your question:
>
> I'm running SVN MythTV, gentoo on an AMD XP 2500, and here's the  
> info you want:
>
> ls -l /usr/lib/libXvMC.so
> lrwxrwxrwx  1 root root 14 Jan 12 19:21 /usr/lib/libXvMC.so ->  
> libXvMC.so.1.0
> mythslave ~ # ls -l /usr/lib/libXvMC.so.1
> lrwxrwxrwx  1 root root 14 Jan 12 22:28 /usr/lib/libXvMC.so.1 ->  
> libXvMC.so.1.0
>
>
> No longer have an XvMCConfig, removed after I did all the things
> mentioned above.
>
> ldd /usr/bin/mythfrontend | grep XvMC
>         libXvMC.so.1 => /usr/lib/libXvMC.so.1 (0xb6a7a000)
>

Much thanks for the reply. I tried your suggestion, uninstalling with  
the installer and unmerging the 7676 drivers, basically starting  
completely from scratch and re-loading 7676 and myth.

FWIW this is an amd64 3700 running Gentoo 2.6.15

I still get (when trying to use XvMC):

Using XvMC version 1.0
XvMC found and using IDCT surface
Using xv port 240
Unable to create XvMC context return status 11 BadAlloc

Other than this things work OK.

So, I am running out of ideas, but I have one more:

I'm using both the VGA and the composite output, driving a 14" LCD  
(vga) and a 32" LCD (via composite). Is there a problem using XvMC  
while driving two outputs. I've gone through the nVidia README and  
haven't seen a prohibition against that but it does allude to some  
limitations.

Thanks again.