Re: ivtv driver inputs randomly "block"

["Brian J. Murrell" <brian@interlinx.bc.ca>]

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On 12-11-29 10:29 AM, Ezequiel Garcia wrote:
> Hi Brian,

Hi Garcia,

> Mmm, the log shows this repeating pattern:
> 
> ---
> Nov 28 17:54:46 cmurrell kernel: [878779.229702] ivtv0:  info: Setup
> VBI start 0x002fea04 frames 4 fpi 1
> Nov 28 17:54:46 cmurrell kernel: [878779.233129] ivtv0:  info: PGM
> Index at 0x00180150 with 400 elements
> Nov 28 17:54:47 cmurrell kernel: [878779.556039] ivtv0 encoder MPG:
> VIDIOC_ENCODER_CMD cmd=0, flags=0
> Nov 28 17:54:49 cmurrell kernel: [878782.059204] ivtv0:  ioctl:
> V4L2_ENC_CMD_STOP
> Nov 28 17:54:49 cmurrell kernel: [878782.059209] ivtv0:  info: close
> stopping capture
> Nov 28 17:54:49 cmurrell kernel: [878782.059214] ivtv0:  info: Stop Capture
> Nov 28 17:54:51 cmurrell kernel: [878784.156135] ivtv0 encoder MPG:
> VIDIOC_ENCODER_CMD cmd=1, flags=1
> Nov 28 17:54:51 cmurrell kernel: [878784.166157] ivtv0:  ioctl:
> V4L2_ENC_CMD_START
> Nov 28 17:54:51 cmurrell kernel: [878784.166165] ivtv0:  info: Start
> encoder stream encoder MPG

Yes, as I indicated.

> And from 15:00 to 18:00 recording fails?

Yes.

> Perhaps it would make sense to restart application upon driver failure,
> now that output is more verbose.

Meaning what exactly?  Restart MythTV?  How would I restart MythTV when
the failure occurs?  Do you mean like having a daemon watching dmesg
that restarts MythTV when this happens?  That's a very ugly hack-around
that will have negative side effects per below...

This failure doesn't necessarily affect all tuners at the same time so I
would potentially be restarting MythTV while other tuners are recording,
interrupting good recordings to fix one tuner which is having a problem.

I am sure you would agree that this is not really a suitable
work-around, yes?

> PS: Please don't drop linux-media list from Cc

I don't think I did.  All of my messages have been copied to the list,
albeit I post them through gmane rather than posting to the list
directly since I read via gmane and am not a direct subscriber to the
list.  Most lists will disallow postings by non-subscribers.  I know
vger.kernel.org does allow posting by non-subscribers on at least some
of their lists but I am not aware of it being a site-wide policy or not
so to be on the safe side I just let gmane post it to the list.

Perhaps you got the copy I CC'd to you directly before you got the copy
that went to the list via gmane.

Cheers,
b.




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