[mythtv-users] IVTV 0.8.1 and PVR 500 with new Samsung tuners

John Drescher drescherjm at gmail.com
Thu Nov 30 05:40:17 UTC 2006


On 11/30/06, Roland Roberts <roland at astrofoto.org> wrote:
>
> >>>>> "John" == John Drescher <drescherjm at gmail.com> writes:
>
>     John> On 11/29/06, Roland Roberts <roland at astrofoto.org> wrote:
>     >> I missed the original post, but...
>     >> I've have my PVR-500 for about a year, and since the upgrade to
> ivtv
>     >> 0.80, I've had problems.  0.81 is no different.  I have several
>     >> channels which are problematic.  At some points it acts very much
>     >> like the mpeg encoder/decoder is "confused" and image blocks get
> all
>     >> jumbled.  Then it will suddenly settle down and work again for a
>     >> while.  This happens both when watching live TV and when recording.
>     >>
>
>     John> This sounds like a dma problem and not the same problem as I
>     John> am having with the prv500.  Actually, I had a similar dma
>     John> problem with my pvr250 which I have connected to an older dual
>     John> processor athlon mp 2400. To solve my issue I patched ivtv to
>     John> not use dma. Look at the source code for PIO.  It works
>     John> flawlessly but takes 25% of one cpu while recording. I did
>     John> this patch a long time ago, as I am using a 2.6.13 kernel on
>     John> that box which is my master backend and I record several hours
>     John> a day as I have > 600 GB of recorded shows at the moment and
>     John> 90%+ of this is with the pvr250.
>
> Hmmm, did you get the DMA error messages mentioned on the ivtv site:
>
>     http://www.ivtvdriver.org/index.php/DMA
>
> 'cause I do *not* see those in my logs.
>
> I do not remember as this was a year ago or more...

John
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