[Openchrome-users] Help enabling XvMC on Epia EN15000G at 1280x768

[Xavier Bachelot]

On 04/18/2011 08:08 PM, Jan Ceuleers wrote:
> Sorry to ping (see below):
> 
> On 10/04/11 10:44, Jan Ceuleers wrote:
>> Hi there.
>>
>> I hope you guys can help me to enable XvMC on a Via Epia EN15000G. The X
>> log says that XvMC is not being used because DRI isn't working, but I do
>> see all sorts of evidence of DRI in that same log.
>>
>> Having googled a lot, my best guess as to what's wrong is that the
>> resolution of my TV (a Sony panel, connected to the VGA port of the
>> Epia, with a resolution of 1280x768), is too high. The SupportedHardware
>> page at openchrome.org says that MPEG2 is supported up to 1024x1024 on
>> what I believe to be a CN700.
>>
>> I'm puzzled though, because if that is indeed the problem then why would
>> DRI not be available?
>>
>> Anyway, I'm using this machine as a MythTV frontend. If I do need to
>> reduce the resolution in order to get XvMC to work (note: currently SD
>> video playback is stuttering), then is it possible to do so while still
>> using the whole screen? I'm asking because the only supported resolution
>> listed in the X log that is 16:9 is 1280x768.
> 
> Am I out of luck:
> 
> - does my hardware just not support XvMC at 1280x768 ?
> - or is this a current limitation of openchrome ?
> - or have I misconfigured something?
> 
The 1024x1024 limitation is against the stream, not the screen. for
example, a standard resolution DVD should be decoded in hardware just
fine (XvMC), and be scaled to the screen resolution by the hardware as
well (Xv), whatever this output resolution is.
FWIW, my Epia M10K (CLE266 with 1Ghz C3 CPU) renders DVDs on a 1920x1200
TV plugged to the VGA port, with a load around 10%.

In your case, I believe something goes wrong within
VIADRIFinishScreenInit, and then dri gets disabled. I'm not sure what,
your xorg log is not verbose enough.

Hope this helps,
Xavier