Video devices

[Paul Check <paul@openstreet.com>]

Hi: I have a webcam and a pvr350 capture card (modules pwc and ivtv 
resp) attached to my machine, running 2.6.16 kernel and udev. The 
classic problem is that these modules get assigned to /dev/video0 and 
/dev/video1 in seemingly arbitrary ways. I've tried forcing module 
loading at boot time but still can't seem to get one to load first 
consistently.

So, I turned to writing udev rules and followed the "writing udev rules" 
document. My goal would be to have udev just symlink

/dev/webcam0   to   /dev/videoM

and

/dev/pvr0 to /dev/videoN,

where M and N are 0 and 1, assignmed however the system so chooses.

I've tried writing udev rules to symlink, but they didn't work. Upon 
further investigation I don't actually see any rules to create the video 
devices in the /etc/udev/rules.d/ directory. And yet, they are created. 
Also, I see they are mentioned in /etc/udev/devfs.rules, but there is no 
symlink to this file in the rules.d/ directory.

So, how do the video devices get created here? Is there some devfs 
left-over? Perhaps if I knew where the /dev/video?'s are being created 
I'd be able to figure out how to symlink to them?! I'm running debian 
unstable, fully updated.

Thanks, Paul


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