[mythtv] EPIA M10k - XvMC: Very high CPU (even when paused!!)

[Paul Bender]

Justin Hornsby wrote:
> On 28/12/06, Colin Guthrie <mythtv at colin.guthr.ie> wrote:
> 
> Up until mythtv 0.20 I was using minimyth for my epia based frontend,
> but it had serious trouble playing back dvb recordings which have
> audio description tracks.  It only had problems if I was using xvmc
> (not using xvmc isnt an option due to the very high cpu usage) and
> deinterlacing.  Playing the same recordings with timestretch enabled
> worked (and looked) great.
> 
> The problem showed itself as momentary pauses in playback every 20
> secs or so, and mythfrontend -v playback showed me lots of NVP
> prebuffering pauses & dropping frames to maintain audio sync.

Have you tried the latest test build of MiniMyth> Several people were 
having ongoing problems with similar symptoms, and the latest test 
release contains changes that fixed the symptoms for several of us.

One of the MiniMyth users did some good detective work trying to track 
down the cause of stuttering that he was having on radio channels. One 
thing that he discovered was that the problem would go away when 
mythfrontend was run as an unprivileged user.

In addition to solving the stuttering that he was seeing with radio 
channels, it solved the stuttering that some of us were seeing with the 
newer NVIDIA drivers.

Therefore, the lastest test build runs mythfrontend as a unprivileged user.

Of course, at some point, it would be interesting to figure out the 
underlying cause. The stuttering with the newer NVIDIA drivers would 
happen when running as root even with the real-time threads check-box 
unchecked, so I do not believe that is the cause. However, I have not 
bothered to look into it yet.