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

[Roland Roberts]

>>>>> "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.

And the problem didn't exist prior to around Nov 1st which is when I
updated my FC5 system and pulled in ivtv 0.80.

roland
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