[mythtv-users] Backend crashing/locking up

Mike Drons mdrons at ins.com
Tue Mar 9 12:29:16 EST 2004

I don't have a /dev/fb1 device?  I am I missing something in my kernel or is
it someplace else since I am running devfs as part of gentoo?


-----Original Message-----
From: Carl [mailto:mythtv at carldunham.com] 
Sent: Tuesday, March 09, 2004 1:21 AM
To: mdrons at ins.com; Discussion about mythtv
Subject: Re: [mythtv-users] Backend crashing/locking up

So 'cat /dev/video0 > /tmp/t.mpg' runs the "encoder", and 'dd if=/tmp/t.mpg 
of=/dev/video16 bs=65536' runs the "decoder" (in quotes because supposedly 
it's the other way around, but I can't grok that). Sometimes ivtv chokes 
doing these things, but by far the biggest source of trouble is the 
framebuffer interactions that produce the on-screen display, program guide, 
etc. This can be touched by doing 'ivtvfbctl /dev/fb1 -senddma', among other


Anyway, there is a lot of work going on to resolve this, check out the IVTV 

On Tuesday March 9 2004 00:41, Mike Drons wrote:
> I have just upgraded to a PVR250 card and my backend is crashing when
> watching live tv after about 2 minutes.
> I have an AMD 2400 with a nvidia gforce2 card running gentoo.
> I have mythtv .14 from an ebuild.
> This is the only error I get on the backend.
> 2004-03-07 23:51:50 Changing from None to WatchingLiveTV
> Couldn't read data from the capture card in 15 seconds.  Game over, man.
> Doing a cat /dev/video0 > /tmp/t.mpg  will capture for over an hour, so I
> don't think it is the ivtv driver.  I saw some discussion on this issue,
> but no one every says what solved the issue.
> I have made sure that the pvr250 has a dedicated IRQ (IRQ 7).  I am using
> IVTV 1.9 drivers for the card.
> Michael Drons
> mdrons at ins.com

Howard Dean for America

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