[mythtv-users] Fast CPU, DMA enabled on HD, Xv enabled, still getting pauses in Live TV

[Joe V]

Brian,

Well, it helps a bit...  I upgraded to bttv 0.7.107
(and specigied gbuffers=10), put my hard drive and
DVD-ROM on seperate cables (don't know if that will
help much), as well as forcing 32-bit operations, and
the stutters, when they happen don't cause such as big
of a delay.

I don't recall any stutters last night when I put my
DDR400 module (running at DDR266) from my desktop in
the machine with those changes (watching for a good 30
minutes), so it could be a memory bandwidth issue as
well as a bttv driver issue (and maybe the HD).

I'll keep experimenting and see what works.

Are you using your machine as just a frontend, or as
both frontend and backend (as I'm doing)?

-- Joe

--- Brian <brian at boid.isa-geek.com> wrote:
> 
> I'm having no issues running .11 with a k7s5a, duron
> 1.1, 512mb of pc133, ata100 drives, TV Wonder VE,
> generic 2.4.21, bttv 0.7.107 (Could not get 0.9.x to
> run properly)
> 
> Hope this can help point you in the right direction
> :/
> 
> Cheerios
> 
> :)
> 
> On Sat, 16 Aug 2003 23:37:16 -0700 (PDT)
> Joe V <joevph at yahoo.com> wrote:
> 
> > This is completely strange, I don't understand it.
> > 
> > I upgraded to an AMD Athlon XP 2400+ (real speed,
> > 2GHz), with an ECS KS57A Pro motherboard today. 
> The
> > motherboard isn't the greatest, but for $89.99 for
> the
> > combo, you can't really beat that.
> > 
> > Anyway, I have my profile for Live TV setup for
> > 480x480, RTJPEG, MP3 Audio compression, level 4
> > (middle of the pack or so).  When I run "top", I
> see
> > that mythbackend ranges from 20-43% (CPU), and
> that
> > mythfrontend ranges from 3-15%.  I have DMA
> enabled on
> > my hard drive (hdparm shows this), XVideo is
> enabled
> > on the second head of the Matrox G400 I'm using. 
> The
> > card being used is a Leadtek Winfast TV XP 2000
> Deluxe
> > (bttv), and I'm using the 2.4.21 kernel, unpatched
> > from kernel.org.
> > 
> > Despite this, I still get a stutter in the
> video/audio
> > every now and then (if you average it out,
> probably
> > once every ten minutes).  The output of "top"
> doesn't
> > seem to spike any, so I don't think that it's the
> CPU
> > not being powerful enough (it should be).
> > 
> > I've tried a bunch of things...  Swapping RAM
> > (currently I'm using PC133, but I took the DDR400
> from
> > my desktop out and tried it), I've tried not
> enabling
> > the second head on the Matrox (using a monitor),
> using
> > ALSA and OSS, using KDE and Blackbox, heck, almost
> > everything I could think of except changing the
> video
> > card (maybe that's it?).  I've also turned off
> > unnecessary services in Red Hat 9 (turned off
> > sendmail, cups, etc.).
> > 
> > Does anybody have any further suggestions?  At
> this
> > point, I'm almost suspecting a hardware problem of
> > some sort.
> > 
> > -- Joe
> > 
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> 
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