/dev/video0

[Sam Varshavchik]

Alain PORTAL writes:

> Hi,
> 
> Can somebody tell me how is created this device?
> 
> When I'm connecting my webcam, nothing happends but in messages.log:
> 
> kernel: usb 4-1.4: USB disconnect, address 3
> kernel: usb 4-1.4: new full speed USB device using uhci_hcd and address 4
> kernel: usb 4-1.4: not running at top speed; connect to a high speed hub
> kernel: usb 4-1.4: configuration #1 chosen from 1 choice
> kernel: 4:3:1: cannot set freq 0 to ep 0x86
> kernel: 4:3:2: cannot set freq 0 to ep 0x86

[ … ]

> v4l2: open /dev/video0: Aucun périphérique de ce type
> v4l2: open /dev/video0: Aucun périphérique de ce type
> v4l: open /dev/video0: Aucun périphérique de ce type
> no video grabber device available
> 
> Where is the problem?

The kernel module is responsible for doing a bunch of things that eventually 
results in the creation of a device node.

If you don't get a device node, it usually means that your hardware device 
is not supported by the Linux kernel.

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