Comment 71 for bug 1728012

@Luca

Bingo

udevadm test /devices/pci0000:00/0000:00:1d.7/usb2/2-4'

shows:

'Invalid rule /etc/udev/rules.d/60-brother-libsane-type1.rules:17: unknown key 'SYSFS{idVendor}'

So consequently your device is configured as printer-only:

RUN '/lib/udev/tlp-usb-udev %p' /lib/udev/rules.d/85-tlp.rules:10
handling device node '/dev/bus/usb/002/003', devnum=c189:130, mode=0664, uid=0, gid=7
preserve permissions /dev/bus/usb/002/003, 020664, uid=0, gid=7
preserve already existing symlink '/dev/char/189:130' to '../bus/usb/002/003'
ACTION=add
BUSNUM=002
DEVNAME=/dev/bus/usb/002/003
DEVNUM=003
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb2/2-4
DEVTYPE=usb_device
DRIVER=usb
ID_BUS=usb
ID_FOR_SEAT=usb-pci-0000_00_1d_7-usb-0_4
ID_MODEL=MFC-1910W
ID_MODEL_ENC=MFC-1910W
ID_MODEL_FROM_DATABASE=MFC-1910W
ID_MODEL_ID=035d
ID_PATH=pci-0000:00:1d.7-usb-0:4
ID_PATH_TAG=pci-0000_00_1d_7-usb-0_4
ID_REVISION=0100
ID_SERIAL=Brother_MFC-1910W_E74244J6N463385
ID_SERIAL_SHORT=E74244J6N463385
ID_USB_INTERFACES=:070102:ffffff:
ID_VENDOR=Brother
ID_VENDOR_ENC=Brother
ID_VENDOR_FROM_DATABASE=Brother Industries, Ltd
ID_VENDOR_ID=04f9
MAJOR=189
MINOR=130
PRODUCT=4f9/35d/100
SUBSYSTEM=usb
SYSTEMD_WANTS=udev-configure-printer@-devices-pci0000:00-0000:00:1d.7-usb2-2\x2d4.service printer.target
TAGS=:systemd:uaccess:seat:udev-configure-printer:
TYPE=0/0/0
USEC_INITIALIZED=4000906
libsane_matched=yes
run: 'uaccess'
run: '/lib/udev/tlp-usb-udev /devices/pci0000:00/0000:00:1d.7/usb2/2-4'