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#1 2009-10-24 14:42:16

Vladislav IV
Member
Registered: 2008-06-23
Posts: 30

Chicony TwinkleCam, can't open /dev/video0: No such device or address

Hi all ! It's been a long time since my last visit here.

I'm experiencing a problem with a Chicony TwinkleCam webcam. I updated my system last week (I haven't updated it for months, woo...), and I wanted to play with my old webcam.

I had a look at the wiki's howto (http://wiki.archlinux.org/index.php/Webcam_setup), and here is what I done :

Plug in the webcam, no module loaded.

$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 002: ID 08ff:2580 AuthenTec, Inc. AES2501 Fingerprint Sensor
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 020: ID 06a5:d800 Divio Chicony TwinkleCam
Bus 007 Device 002: ID 093a:2510 Pixart Imaging, Inc. Hama Optical Mouse
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

$ dmesg|tail
usb 7-1: new full speed USB device using uhci_hcd and address 20
usb 7-1: configuration #1 chosen from 1 choice

According to http://mxhaard.free.fr/spca5xx.html, my webcam needs sn9c102. Here we go :

$ sudo modprobe sn9c102
$ lsmod|grep sn9
sn9c102               142468  0 
videodev               37088  1 sn9c102
usbcore               154032  5 sn9c102,usbhid,uhci_hcd,ehci_hcd

$dmesg|tail
Linux video capture interface: v2.00
sn9c102: V4L2 driver for SN9C1xx PC Camera Controllers v1:1.47pre49
usbcore: registered new interface driver sn9c102

Plug the webcam :

$ dmesg|tail
usb 7-1: new full speed USB device using uhci_hcd and address 22
usb 7-1: configuration #1 chosen from 1 choice

$ xawtv
This is xawtv-3.95, running on Linux/i686 (2.6.31-ARCH)
xinerama 0: 1280x800+0+0
can't open /dev/video0: No such file or directory
v4l-conf had some trouble, trying to continue anyway
v4l2: open /dev/video0: Aucun fichier ou dossier de ce type
v4l2: open /dev/video0: Aucun fichier ou dossier de ce type
v4l: open /dev/video0: Aucun fichier ou dossier de ce type
no video grabber device available

Here we are. There is no /dev/video0, nor /dev/video nodes. I made them with the following commands :

# mknod /dev/video0 c 81 0
# chmod 666 /dev/video0
# ln -s /dev/video0 /dev/video
# chown root:video /dev/video*

$ ls -l /dev/video*
lrwxrwxrwx 1 root root     11 oct.  24 16:03 /dev/video -> /dev/video0
crw-rw-rw- 1 root video 81, 0 oct.  24 16:03 /dev/video0

$ groups
tty wheel log locate games kvm network video audio optical storage scanner power users tex ntfs

$ xawtv
This is xawtv-3.95, running on Linux/i686 (2.6.31-ARCH)
xinerama 0: 1280x800+0+0
can't open /dev/video0: No such device or address
v4l-conf had some trouble, trying to continue anyway
v4l2: open /dev/video0: Aucun périphérique ou adresse
v4l2: open /dev/video0: Aucun périphérique ou adresse
v4l: open /dev/video0: Aucun périphérique ou adresse
no video grabber device available

This didn't worked. VLC doesn't work either, nor mplayer. I searched the forum and the Web, but can't find what is the problem. The /dev/videox nodes are not created automatically, and I read somewhere the issue appeared with a kernel update, but I can't get more information, and get my webcam working.

I loaded the bttv module, but it didn't helped. Anyone else having this issue ?

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