Arch Linux

jiyunatori

Member

Registered: 2008-07-04

Posts: 54

/dev/video0 is not created [solved]

Hi there. I'm confused. My old quickcam doesn't work anymore. It used to work a month (or so) ago.

I have the qc-usb package installed. When I plug the webcam, modules are loaded, informations are given :

$ dmesg
usb 3-2: new full speed USB device using uhci_hcd and address 9
usb 3-2: configuration #1 chosen from 1 choice
Linux video capture interface: v2.00
quickcam: QuickCam USB camera found (driver version QuickCam USB 0.6.6 $Date: 2006/11/04 08:38:14 $)
quickcam: Kernel:2.6.28-ARCH bus:3 class:FF subclass:FF vendor:046D product:0870
usbcore: registered new interface driver quickcam

$ lsusb
Bus 004 Device 004: ID 1668:2441 Actiontec Electronics, Inc. [hex] BMDC-2 IBM Bluetooth III w.56k
Bus 004 Device 001: ID 1d6b:0001  
Bus 003 Device 010: ID 046d:0870 Logitech, Inc. QuickCam Express
Bus 003 Device 001: ID 1d6b:0001  
Bus 002 Device 001: ID 1d6b:0001  
Bus 001 Device 001: ID 1d6b:0002

As suggested by someone on IRC, I compared the content of /dev with and without the webcam :

$ diff before after 
145a146,149
> usbdev3.10
> usbdev3.10_ep00
> usbdev3.10_ep81
> usbdev3.10_ep82

I checked back the wiki page on webcams. It got me to the page about qc-usb. This page says the package provides the c-qcam module.

$ pacman -Ql qc-usb
qc-usb /lib/
qc-usb /lib/modules/
qc-usb /lib/modules/2.6.28-ARCH/
qc-usb /lib/modules/2.6.28-ARCH/kernel/
qc-usb /lib/modules/2.6.28-ARCH/kernel/drivers/
qc-usb /lib/modules/2.6.28-ARCH/kernel/drivers/usb/
qc-usb /lib/modules/2.6.28-ARCH/kernel/drivers/usb/media/
qc-usb /lib/modules/2.6.28-ARCH/kernel/drivers/usb/media/quickcam.ko
qc-usb /usr/
qc-usb /usr/bin/
qc-usb /usr/bin/qcset

Obviously it doesn't.

$ pacman -Qo `slocate c-qcam`
/lib/modules/2.6.28-ARCH/kernel/drivers/media/video/c-qcam.ko is owned by kernel26 2.6.28.8-1

What's going on ?

The wiki page says that there has been some change since the kernel 2.6.27. I'm not quite sure to understand what's going on there, but I checked the productId of my webcam (0x0870) to the database of supported webcam drivers, and it looks like it is not there.

Anyway, if someone has a clue on what's going on, that would be nice ...

Last edited by jiyunatori (2009-04-13 19:41:53)

byte

Member

From: Düsseldorf (DE)

Registered: 2006-05-01

Posts: 2,046

Re: /dev/video0 is not created [solved]

In theory, you shouldn't have to install any package, as most webcams are now supported directly through the kernel. Are you in the video group?

Last edited by byte (2009-03-28 05:43:11)

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jiyunatori

Member

Registered: 2008-07-04

Posts: 54

Re: /dev/video0 is not created [solved]

In theory, you shouldn't have to install any package, as most webcams are now supported directly through the kernel. Are you in the video group?

yes I am. But as I said in my previous post, I didn't find my webcam's productId in the database ...

jiyunatori

Member

Registered: 2008-07-04

Posts: 54

Re: /dev/video0 is not created [solved]

With a new camera, it works perfectly. It looks like my former camera was one of the very few not supported.