[mythtv-users] Zotac Ion VDPAU settings choices

Travis Tabbal travis at tabbal.net
Fri Nov 13 15:41:48 UTC 2009

On Fri, Nov 13, 2009 at 8:37 AM, Josh White <jaw1959 at gmail.com> wrote:

> Good day,
> I just got my hands on a Zotac IONITX-B-E Intel Atom Nvidia ION Mini ITX
> MB, and I'm fairly certain others out there are using the same board.
> I figure some people have done a lot of trial and error to see what settings
> work best, in the widest range of situations, and I was hoping to gain from
> that collective experience.
>   I'm running Ubuntu 9.10, using the Mythfrontend .22+fixes from the
> standard ubuntu repos.  When I got my machine up and running, I decided to
> see what it can do.  On another backend/frontend I use, which has nvidia
> 8200 onboard graphics, I can watch two of my more demanding video files
> perfectly smooth on my 1080p display, using VDPAU, with minimal CPU usage.
> With my new Ion machine, I have problems with the same files using a
> 1280x1024 CRT display (an old desktop monitor).  I've noticed two distinct
> problems with these files: playback of one file there has a lot of blocky,
> discolored garbage in the screen during more active parts of the movie, and
> in the other, the movie skips like it simply cannot process the data fast
> enough.  They are both .mkv h264 files, and I'm not sure of the exact
> bit-rate, but one is a 6gb file, and the other is about 4gb (respecitvely),
> and they're approximately 2 hours in length.  I have my 8200 machine set to
> use VDPAU for everything, advanced 1x HW deinterlacing, with the fallback
> deinterlacer set to none.  I've tried the same settings on my Zotac, with no
> success, as well as the 3 included VDPAU playback profiles.
> So that's what I know from the top of my head, and I'd appreciate any
> suggestions, tips, or things I should try.

The wiki has a few hints that might help. One I remember helping my onboard
VDPAU was to increase the min CPU speed so that the memory bandwidth isn't
limited. As the chipset uses more power than the CPU on those boards,
locking the CPU at it's max clock rate is unlikely to make a significant
difference in power use.
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