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Old 12-13-2006, 11:49 AM   #1
Registered: Aug 2004
Location: Argentina
Distribution: slackware 12
Posts: 211

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Question device node created using mknod dissapear after reboot

I'm trying to make a webcam work under my slack10.2/2.6.18
In fact is a so cheap cam, that it doesn't even have any label.
I discover that the driver (probably) is the sn9c102.
the point is that, according to:
if I don't have a /dev/video0 node, I have to create it with
coz I don't have it, I follow such recipe with the commands:
mknod /dev/video0 c 81 0;chown root.users /dev/video*;chmod g+rw /dev/video0
but xawtv continue complainin' there's no /dev/video0 device.
So, I reboot waiting the new node becomes 'visible' to the system.. but when I do so, /dev/video0 doesn't exist anymore! It disappear after rebooting. is that normal? am I forgetting any command?

any idea what's wrong, or what should I do to have an operating video device node?

thanks in advance
Old 12-13-2006, 12:27 PM   #2
Registered: Dec 2005
Location: "The South Coast of Texas"
Distribution: Slackware64-current
Posts: 507
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created device node disappears on reboot

It depends on whether you are using a 2.6 series kernel & udev on your 10.2 install. If you are using udev, it repopulates /dev with every boot. You would have to research udev (see recent-state-of-udev & writing_udev_rules) and write a udev rule for your camera. Edit: Pay particular attention to permissions.
If you are using a 2.4 series kernel, thus no udev, I don't know what may be going on.

Last edited by TSquaredF; 12-13-2006 at 12:28 PM.
Old 12-13-2006, 05:12 PM   #3
Registered: Aug 2004
Location: Argentina
Distribution: slackware 12
Posts: 211

Original Poster
Rep: Reputation: 30
thanks, TSquaredF !
gonna go in that direction


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