>>>>>> "HV" == Hans Verkuil <[EMAIL PROTECTED]> writes:
>
> HV> Looks like 0.10.6 is the one to use. ivtv 0.10.6 doesn't prevent DMA
> HV> errors, it just prevents the card from crashing. The erroneous DMA
> HV> transfers are retried to prevent loss of data.
>
> Well, that's good...
>
> But... It seems to happen more frequently *and* I end up with
> zero-length files sometimes too.
>
> HV> Can you give a few sample lines from the log with the DMA errors?
>
> Sure, but they're not exciting:
>
> Dec 3 20:20:26 machine kernel: ivtv0: DMA TIMEOUT 00000001 0
> Dec 3 20:21:56 machine kernel: ivtv0: DMA TIMEOUT 00000001 0
> Dec 3 20:22:50 machine kernel: ivtv0: DMA TIMEOUT 00000001 0
> Dec 3 20:24:04 machine kernel: ivtv0: DMA TIMEOUT 00000001 0
> Dec 3 20:24:10 machine kernel: ivtv0: DMA TIMEOUT 00000001 0
Ah, you get DMA TIMEOUTs, that is serious. You where talking about DMA
ERRORs, so I didn't realize that.
Run ivtvctl -D584 to enable debugging, start a capture and when you get
DMA TIMEOUTs just send the logging to me (usually ends up in
/var/log/messages). I need the logging during the 10 seconds leading up to
the first DMA TIMEOUT.
I have one other report about this happening with a certain kind of DMA
error, so it will be interesting to see if it is the same DMA error that's
causing this.
Regards,
Hans
> Is there anything that can be done when the errors start happening?
> Maybe quickly (automatically) stopping the app (myth), removing the
> module and reinserting and restarting the app? Or would it likely take
> a complete reset before the issues get dealt with.
>
> They seem to happen repeatedly once they start...
>
> --
> "In the bathtub of history the truth is harder to hold than the soap,
> and much more difficult to find." -- Terry Pratchett
>
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>
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