[mythtv-users] pvr-150 occasionally swaps /dev/video1 to /dev/video0

stefan_jones at comcast.net stefan_jones at comcast.net
Sat Mar 29 16:12:38 UTC 2008


 -------------- Original message ----------------------
From: "Kevin Kuphal" <kkuphal at gmail.com>
> On Fri, Mar 28, 2008 at 12:37 PM, <stefan_jones at comcast.net> wrote:
> 
> > I have two capture cards in my mythbox:
> >
> > pchdtv-3000, which has been in the box for a while but which  I just
> > recently got working and configured,
> >
> > Happague PVR-150, which is my main recording inteface. It is addressed as
> > /dev/video1
> >
> > Whenever the HDTV-3000 is installed, and configured, something odd happens
> > -- often but now always -- after a system reset. The Happague card kind of
> > disappears on me. Specifically, the configuration listing swaps from
> > /dev/video1 to /dev/video0. It's like the binding between the database
> > information and the hardware gets lost.
> >
> > The fix is easy; I turn off mythbackend, bring up mythtvsetup, and go to
> > the Capture Cards listing for the Happague. The config page will show
> > /dev/video0, and list the hdtv-3000 card as hardware it's seeing. I just
> > need to switch /dev/video0 to /dev/video1 and I'm back in business.
> >
> > Anyone else see this? Is there a way to keep this from happening?
> 
> 
> The hard way: write udev rules
> This has always troubled me
> 
> Easy way (for me): Add an option line to your ivtv module in modprobe.conf
> options ivtv ivtv_first_minor=1
> 
> This will cause ivtv to always take /dev/video1 (double check with a google
> search to see if ivtv_first_minor is 0 based) which leaves /dev/video0
> always open for your hdtv-3000 card.
> 
> Kevin

Yeah, that did the trick . . . once I put the rule into _modprobe.conf_ and not _modeprobe.conf_, a file I had mistakenly created two years ago when setting up the system!

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From: "Kevin Kuphal" <kkuphal at gmail.com>
Subject: Re: [mythtv-users] pvr-150 occasionally swaps /dev/video1 to /dev/video0
Date: Fri, 28 Mar 2008 18:28:54 +0000
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