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* PVR x50 corrupts ATSC 115 streams
@ 2009-02-17 15:53 David Engel
  2009-02-17 16:05 ` Steven Toth
  2009-08-07  2:50 ` David Engel
  0 siblings, 2 replies; 34+ messages in thread
From: David Engel @ 2009-02-17 15:53 UTC (permalink / raw)
  To: linux-media, V4L; +Cc: Hans Verkuil

Hi,

My old, MythTV, master backend finally gave up the ghost this past
weekend.  The power supply or motherboard got bad enough there wa no
stability.  No big deal.  I was planning to replace that system soon
and had all of the parts ready anyway.

I moved the disks and tuner cards (2 Kworld ATSC 115s, 1 Hauppauge PVR
250 and 1 Hauppauge PVR 350) to the new system (AMD X2 3600 CPU and
Biostar TForce 550 motherboard).  Things went fairly smoothly and I
seemed to have full stability again for the first time in several
weeks.

Then, I started noticing frequent corruption in some of my claar QAM
recordings from the ATSC 115 cards.  When the corruption is present,
it occurs every few seconds -- a splotch of garbage in the picture
here, a stutter and a skipped frame there.  Sure enough, MythTV and
mplayer both report CRC, damage, splice and other errors when playing
the streams.

I finally determined the stream corruption happens if and only if one
of the PVR x50 cards is being used at the same time.  If only the ATSC
115s are used, there is no corruption.  As soon as either of the PVr
X50 is used with an ATSC 115, there is corruption.  I tested with the
stock drivers from the 2.6.27.17 kernel and from current Hg.  The
corruption happens with both sets of drivers.  FWIW, I haven't noticed
any corruption with the analog recordings from the PVR x50s.

Does anyone know what might be going on?  These very same tuner cards
worked fine in the old system (Intel P4 3.0GHz CPU and Abit IC7
motherboard) for close to two years.

David
-- 
David Engel
david@istwok.net

^ permalink raw reply	[flat|nested] 34+ messages in thread
* Re: PVR x50 corrupts ATSC 115 streams
@ 2009-02-18 12:41 Andreas
  2009-02-18 15:39 ` David Engel
  2009-02-19  3:37 ` CityK
  0 siblings, 2 replies; 34+ messages in thread
From: Andreas @ 2009-02-18 12:41 UTC (permalink / raw)
  To: linux-media

Am Dienstag, 17. Februar 2009 21:19:45 schrieben Sie:
[...]
> So what does all of this indicate?  My original hunch was that it's a
> problem with the x50 hardware or driver (at least in combination with
> my motherboard).  I think I'm back to that conclusion.
>
> BTW, in my testing last night, I tried changing the PCI latency timer
> on the x50 cards.  I thought maybe it was holding off access to the
> 115 cards.  Changing that had no effect.

Just to let you know that you're not alone:
I had a simiilar problem with the combination of an AverMedia A180 and 
two Asus Falcon (they use the ivtv drivers and firmware). Whenever one 
of the Falcons was recording, I got blips and dropouts on the 
AverMedia. I chalked it off to a flaky mainboard and seperated the 
Falcons and the Avermedia in two different computers. A while later I 
got a new mainboard and additional ATSC tuner cards. As long as I had 
two of the ATSC tuner cards installed, the recordings were ok, except 
for an occasional dropout. But when I put a third ATSC tuner in, the 
recordings were barely watchable. After I put two ATSC tuners (2x 
Avermedia A180) in a different computer, they *all* are recording 
almost perfectly. Even a HVR-1600 card that I had dismissed as broken, 
delivers very good recordings in the other computer.

-- 
Gruß
Andreas

^ permalink raw reply	[flat|nested] 34+ messages in thread
end of thread, other threads:[~2009-08-07  2:50 UTC | newest]

Thread overview: 34+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2009-02-17 15:53 PVR x50 corrupts ATSC 115 streams David Engel
2009-02-17 16:05 ` Steven Toth
2009-02-17 20:17   ` David Engel
2009-02-17 20:29     ` Steven Toth
2009-02-17 20:56       ` David Engel
2009-02-17 21:05         ` Devin Heitmueller
2009-02-17 22:29           ` Steven Toth
2009-02-17 22:38             ` Devin Heitmueller
2009-02-18 15:16               ` Steven Toth
2009-02-19  2:11                 ` CityK
2009-02-19 15:26                   ` Steven Toth
2009-02-18  5:19       ` David Engel
2009-02-18  8:25         ` Rudy Zijlstra
2009-02-18 15:29           ` David Engel
2009-02-18 14:56         ` Steven Toth
2009-02-18 15:34           ` David Engel
2009-02-19 16:28             ` David Engel
2009-02-19 16:44               ` Steven Toth
2009-02-22 19:35               ` CityK
2009-02-23 18:39                 ` David Engel
2009-02-23 19:06                   ` Steven Toth
2009-02-23 20:10                     ` David Engel
2009-02-23 21:53                       ` Steven Toth
2009-02-23 22:03                         ` Devin Heitmueller
2009-02-23 22:48                           ` David Engel
2009-02-23 22:58                             ` Devin Heitmueller
2009-02-24  1:38                               ` pat-lkml
2009-02-24 16:40                               ` David Engel
2009-02-24  0:05                       ` Andy Walls
2009-08-07  2:50 ` David Engel
  -- strict thread matches above, loose matches on Subject: below --
2009-02-18 12:41 Andreas
2009-02-18 15:39 ` David Engel
2009-02-19  3:37 ` CityK
2009-02-19 13:30   ` Andreas

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