Usb scanner with root permissions only

Question

Hello
When I open xsane with regular a user, the scanner does not get detected by it. Only when I open xsane as root.
That's probably a permission issue. My user is added to the scanner group.
How would I correct this?
Thanks

Answer 1

brebs wrote:
Write a udev rule to identify the scanner and give it the right user group & permissions. Google search is your friend
Just to confuse the hell out of us, different distros use different group names. Some have "scanner", some use "usb", some don't even have "usb".
Example:  In /etc/udev/rules.d/91-local.rules
# Scanner.
# sane-find-scanner ; scanimage -L
# From http://forums.gentoo.org/viewtopic-p-33 … ml#3311185
# udevadm info -a --name /dev/usbdev5.3_ep00
# "libusb:003:015" probably means /dev/bus/usb/003/015
SUBSYSTEM=="usb", ATTRS{product}=="CanoScan", GROUP="usb", MODE="0660", SYMLINK+="lide25"
I googled it quite a bit to find out this process is rather difficult for newbies. I even read udev wiki but I can't come up with a rule myself. The gentoo forum post you referenced has udevinfo command while it has been replaced with udevadm and the script wouldn't work.
Would you give me more directions?
Here's the output of sane-find-scanner as root.
[root@myhost ~]# sane-find-scanner
found USB scanner (vendor=0x03f0 [HP], product=0x2504 [Deskjet F4200 series]) at libusb:001:004
found USB scanner (vendor=0x050d [Belkin], product=0x705c [USB2.0 WLAN]) at libusb:001:003
[root@myhost ~]# scanimage -L
device `hpaio:/usb/Deskjet_F4200_series?serial=CN83I3Y197052D' is a Hewlett-Packard Deskjet_F4200_series all-in-one
device `v4l:/dev/video0' is a Noname Kworld ATSC110/115 virtual device
[root@myhost ~]#
I understand the device would be 001:004, but how would I write a rule for it?
Thanks