[mythtv-users] cannot open /dev/video0

[Abigail Smith]

  Ok now we're getting somewhere.  depmod and modprobe both returned with 0 (echo $?) and no errors.
   
  The ivtv module is loaded (lsmod) and modprobe.conf has plenty of stuff in there but I am not certain if it's "correct".
   
  /var/log/messages is the key tho.  
   
  grep ivtv /var/log/messages >> "unable to open firmware v4l-cx2341x-enc.fw....."    "failed loading encoder firmware".
   
  Ok so that's the problem.  Any hints on the solution?
   
  Thanks,
   
  Abby
   
  

Matt Rude <mythtv-users at mattrude.com> wrote:
  Abigail Smith wrote:      
  I installed Knoppix-Myth on a 2 ghz pc with pvr-350.  I ran "cat /dev/video0 > /tmp/aa.mpg" and got "/dev/video0: no such device".

    
  # ls -l  /dev/video0 tho does show the device file.
   
  The installation was done as root.
   
  Rsvp & thanks,
   
  Abby

Brad DerManouelian <myth at dermanouelian.com> wrote:
  On Nov 14, 2006, at 9:18 AM, Abigail Smith wrote:

>
> Sorry for this newbie question... I'm unable to get myth working. 
> The box recognizes my hauppauge 350 but I still get the error 
> "cannot open /dev/video0 to probe its inputs".
>
> Can someone give me some troubleshooting advice? Where do I even 
> start troubleshooting this?
>
> Thanks,
>
> Abby

"probe its inputs" sounds like you're trying to run mythtv-setup when 
you get this error? Try running it as root. It's easier than setting 
udev rules for permissions and works for most people (re: Jarod's 
Guide).

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Abigail-
If you can't list /dev/video0 then it's not a permission problems (sorry guys) is a driver problem.
1st what do you see when you do a ls -l /dev/vide* do you see a /dev/video1 file or anything like that?  
2nd conferm you have the ivtv driver installed on your system that is the same version as your kernel (I'm on Fedora so I don't know what version Knoppix is on.)
3rd look at your modprobe (/etc/modprobe.conf) do you have the ivtv setup?
4th what happens when you run:  (as root)
/sbin/depmod -a
/sbin/modprobe ivtv

Look in /var/log/message and see if you have any ivtv errors.

Thanks
-Matt
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