[mythtv-users] Fw: [ivtv-users] PVR-150 fails after working for a few hours/days at a time, zero-byte recordings

[Quinten Steenhuis]

Thanks, I will try this.



----- Original Message ----
> From: John Drescher <drescherjm at gmail.com>
> To: Discussion about mythtv <mythtv-users at mythtv.org>
> Sent: Friday, August 28, 2009 12:17:26 PM
> Subject: Re: [mythtv-users] Fw: [ivtv-users] PVR-150 fails after working for a few hours/days at a time, zero-byte recordings
> 
> On Fri, Aug 28, 2009 at 11:19 AM, John Drescherwrote:
> > On Fri, Aug 28, 2009 at 10:29 AM, Quinten
> > Steenhuiswrote:
> >>
> >> This is a message I sent to the IVTV list, after searching the archives for a 
> potential solution. My thought was to send it to the more specialized list, but 
> if anyone has other ideas on this list, I'd be willing to try before spending 
> more $$.
> >>
> >> Quick answer to Greg's questions:
> >>
> >>
> >> Gigabyte GA-M78SM-S2H (from my memory-may be slightly different model), with 
> Athlon 64 X2.
> >> DDR ram, two modules
> >> Mythbuntu 8.10
> >> Kernel 2.6.27-14 SMP (stock mythbuntu, but I did download and install custom 
> ALSA modules)
> >>
> >> It generally works for a short while, sometimes for a few days, before the 
> error pops up. When the error occurs, I can't record via MythTV or via cat 
> /dev/video0 | mplayer -
> >>
> >> My other tuner, an HD Homerun, works.
> >>
> >>
> >> ----- Forwarded Message ----
> >>>
> >>> Hi,
> >>>
> >>> I have a pvr-150 low profile card, which I use for watching analog cable tv.
> >>>
> >>> Usually it works briefly after a reboot, but inevitably I get the dreaded 
> DMA
> >>> errors, which look like this:
> >>>
> >>> [104235.184516] ivtv0: DMA TIMEOUT 00000001 0
> >>>
> >
> > This used to happen for some users several years ago (even before the
> > driver made it into the mainline kernel). I had this on my master
> > backend back in 2007 or so.. However I have not had not seen that
> > since and I also have not  seen much of this on the last 2 years or
> > so. Two things I remember from back then to try were disabling
> > frequency scaling and/or disabling SMP.
> >
> > Also (i just remembered) you can completely get around the DMA problem
> > by forcing the ivtv driver to use PIO instead. This is what I did on
> > the ivtv 0.10.X out of kernel driver. I am not sure if this workaround
> > still works on the in source kernel.
> >
> > Here is the patch for 0.10.X
> >
> > 
> http://github.com/drescherjm/jmdgentoooverlay/blob/46cad12ba2d03a9c1a85f64663382d31e21a429e/media-tv/ivtv/files/ivtv-0.10.3-pio.patch
> >
> > John
> >
> 
> http://www.gossamer-threads.com/lists/ivtv/users/35897
> 
> -- 
> John M. Drescher
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