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Old 23rd December 2011, 09:04 PM
cc7gir Offline
Registered User
Join Date: Jan 2010
Posts: 10
Scanner Permission


I have a Brother-7440N and its works as a printer for all the normal users, but I would also like to get the scanner working, without needing root permissions.
I installed the drivers provided by Brother, and it only works as root.

$ sudo simple-scan
There is no scanner group that I can add my user to.
Is it correct to add the users who need the scanner to the lp group?


Simply creating a scanner group and adding users to it does not help.
I have a feeling I might need to write udev rules, but I have almost no knowledge of how it works and what it actually is.

Alright, I am fairly certain have to write a udev rule for this to work.
$ udevadm monitor
gives this when I turn the unit on and off:
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[4460.750468] remove /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/usb/lp0 (usb)
KERNEL[4460.750510] remove /class/usb (class)
KERNEL[4460.750551] remove /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0 (usb)
KERNEL[4460.750584] remove /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.1 (usb)
KERNEL[4460.750619] remove /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.2 (usb)
KERNEL[4460.750841] remove /devices/pci0000:00/0000:00:1d.0/usb2/2-2 (usb)
UDEV [4460.755083] remove /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/usb/lp0 (usb)
UDEV [4460.755564] remove /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.2 (usb)
UDEV [4460.756349] remove /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.1 (usb)
UDEV [4460.759510] remove /class/usb (class)
UDEV [4460.759561] remove /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0 (usb)
UDEV [4460.765402] remove /devices/pci0000:00/0000:00:1d.0/usb2/2-2 (usb)

KERNEL[4469.608217] add /devices/pci0000:00/0000:00:1d.0/usb2/2-2 (usb)
KERNEL[4469.610570] add /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0 (usb)
KERNEL[4469.615473] add /class/usb (class)
KERNEL[4469.615767] add /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/usb/lp0 (usb)
KERNEL[4469.615812] add /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.1 (usb)
KERNEL[4469.615914] add /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.2 (usb)
UDEV [4469.616377] add /class/usb (class)
UDEV [4469.696647] add /devices/pci0000:00/0000:00:1d.0/usb2/2-2 (usb)
UDEV [4469.704955] add /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.2 (usb)
UDEV [4469.713270] add /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0 (usb)
UDEV [4469.719504] add /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.1 (usb)
UDEV [4469.720921] add /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/usb/lp0 (usb)

Last edited by cc7gir; 23rd December 2011 at 09:43 PM.
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brother, permission, scanner

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