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List:       mythtv-users
Subject:    Re: [mythtv-users] Fw: [ivtv-users] PVR-150 fails after working for
From:       Quinten Steenhuis <q.steenhuis () yahoo ! com>
Date:       2009-08-31 14:28:13
Message-ID: 206794.40220.qm () web57414 ! mail ! re1 ! yahoo ! com
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Thanks, I will try this.



----- Original Message ----
> From: John Drescher <drescherjm@gmail.com>
> To: Discussion about mythtv <mythtv-users@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
> _______________________________________________
> mythtv-users mailing list
> mythtv-users@mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users



      
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