logitech quickcam works only as root

vertigo88x · 02-23-2008, 01:16 PM

Code:

]# lsmod | grep vid
usbvideo               26372  2 quickcam_messenger
compat_ioctl32          5120  1 usbvideo
videodev               29056  2 usbvideo
v4l2_common            18432  1 videodev
v4l1_compat            16004  1 videodev

# ls -l /dev/video
lrwxrwxrwx 1 root root 6 2008-02-23 12:39 /dev/video -> video0

$ dmesg | grep vid
Boot video device is 0000:00:02.0
totem-video-thu[2792]: segfault at b3cfd000 eip 07163bd0 esp b5688a60 error 4
Linux video capture interface: v2.00
drivers/media/video/usbvideo/quickcam_messenger.c: Logitech Quickcam Messenger USB v0.01
videodev: "QCM USB Camera" has no release callback. Please fix your driver for proper sysfs support, see http://lwn.net/Articles/36850/

rayfordj · 02-23-2008, 04:45 PM

what are the permissions on /dev/video0 that /dev/video links to?

example:

Code:

$ ll *video*
lrwxrwxrwx 1 root root 6 2008-02-23 16:43 video -> video0
-rw------- 1 root root 0 2008-02-23 16:42 video0

(i dont have a /dev/video but used that just for demonstration)

The problem likely lies there...

vertigo88x · 02-23-2008, 05:58 PM

Code:

$ ls -l /dev/video0
crw-rw---- 1 root root 81, 0 2008-02-23 12:39 /dev/video0

rayfordj · 02-23-2008, 06:37 PM

A couple of things you may try to see if you can get it to work for your user are:

change it (non-persistent) to your user

Code:

chown <your username> /dev/video0

allow anyone rw permissions (if this is your system or a family system then security to this device may not be a concern)

Code:

chmod 666 /dev/video0

If either of these work or are acceptable given your concerns and system's use you could probably get away with just adding a udev rule to perform the necessary modification at device creation time so you (or multiple users) may use it without the need for logging in as root.