[mythtv-users] Problems with vdpau decoding HD content

Nick Rout nick.rout at gmail.com
Fri May 14 01:10:20 UTC 2010

On Fri, May 14, 2010 at 10:41 AM, Scott <list-mythtv at bluecamel.eml.cc> wrote:
> On May 13, 2010, at 4:42 PM, Brian Long wrote:
> On Thu, May 13, 2010 at 1:14 AM, Scott <list-mythtv at bluecamel.eml.cc> wrote:
>> This is a general query to help me with my troubleshooting of a playback
>> problem on my FE.
>> I have an ASRock 330 ION loaded with Mythbuntu 10.04 and the 0.23-fixes
>> SVN 24572. The system uses the VDPAU Normal profile and is configured for
>> 512MB of GPU RAM in BIOS.
>> Playback with both recorded 720p and 1080i (OTA ATSC from a HDHR) shows
>> seems to run into a glitch. The show starts off fine and pausing, FF/RW, and
>> commercial skip all work fine. At some point, usually 12-30 minutes, the
>> video starts jumping and sometimes the audio too. I see "prebuffering pause"
>> messages logged in mythfrontend.log.
> Are you sure the ASRock is not overheating?  I had problems on my Zotac
> ION-ITX Atom 230 board with passive cooling.  Any time I ran 1080i content
> with a deinterlacer, it appears the GPU would scale back due to heat.  This
> would cause the image to jerk, etc.
> I ended up installing a small 40mm fan in the Mini-Box M350 case I am using
> and I've not had jerky video since.  FYI, to my knowledge, only kernel
> 2.6.32 has the needed modules to check ION GPU and/or CPU temperature with
> lm-sensors.
> Hmm, I don't think it's over heating? The ASRock has a small fan in it. I'll
> add installing sensors to my list and monitor it.

You can monitor the GPU temp with:

watch "DISPLAY=:0 nvidia-settings -q GPUCoreTemp|grep Attribute"

(Best to do from another machine via ssh while you are running mythfrontend)

> --
> Scott <catfather at donpoo.net>
> AIM: BlueCame1
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