[mythtv-users] XvMC Problem and Question

[Timothy Braje]

Brian Wood wrote:
> On Feb 10, 2006, at 8:59 AM, Sérgio Gaspar wrote:
> 
> 
>>>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.
>>>
>>
>>Well, I'm also running myth on an amd64 (3000+ Venice core) and I  
>>can't
>>get XvMC to work. Some time ago I asked for help on this list and  
>>someone
>>told me that it was a  problem with the nvidia driver on 64bit  
>>machines,
>>so I gave up.
>>
>>I don't read all messages on this list but since then I have never  
>>read a
>>success story regarding XvMC on AMD64 using Geforce FX 5200 or better
>>nvidia cards.
>>
>>The result is that I can use the PiP function and have colour OSD,  
>>and I
>>know  that the PiP doesn't work and OSD is B&W while using XvMC  
>>(had XvMC
>>working on an Athlon XP). The only anoyance for me regarding not using
>>XvMC is that the CPU cooler runs faster and it's the noisiest fan  
>>on my
>>system.
>>
>>On the old Athlon XP I was able to use XvMC on the TVout, the VGA  
>>output
>>was still active at a different resolution but I don't remember if  
>>XvMC
>>was working there too. This means you can have two outputs and that  
>>won't
>>stop you from using XvMC at least on one of them.
>>
>>Good luck.
>>
> 
> 
> Well it wouldn't be the first time I've spent hours trying to make  
> something work that "shouldn't".
> 
> The amd64 seems to be a very popular CPU from what I've seen on this  
> list, although I don't know how many users are running 64-bit, as  
> opposed to 32-bit MythTV installations (knoppmyth?) on them. The  
> nVidia cards also seem quite popular for MythTV installations. I  
> would think that a limitation on XvMC on this combination would be  
> well-known, but OTOH these CPUS are fast enough that maybe folks just  
> don't use it?
> 
> I don't really *need* XvMC, and from the limitations you mentioned it  
> sounds like I wouldn't use it even if I get it working, but you know  
> how it is -- it just "bugs" me when something doesn't work :-)
> 
> If anyone can confirm that XvMC will not work on an amd64 in 64-bit  
> mode it would be nice, conversely if anyone has it working I'd be  
> interested as well. I'll try and ask nVidia directly, but it seems  
> they make it hard to actually ask a question, I think you have to  
> "register your product" before you can do so, and their  
> "knowledgebase" seems to consist of the (admittedly pretty good)  
> README file :-((
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I am currently running AMD64 in 64bit mode on debian linux.  I have an 
ASUS EN5750 (nvidia 5750 chipset, pci-express).  I am running myth svn 
as of a few days ago, and the latest nvidia drivers.  I haven't done 
thorough testing, but XvMC seems to be working.  I haven't played with 
opengl v-sync, though...