Same problem, in my case with a USB-attached Canon Canoscan N650U (an
ancient, well supported scanner, that was working just fine on
12.04LTS).
$ lsusb
Bus 002 Device 002: ID 174c:3074 ASMedia Technology Inc.
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 012: ID 04a9:2206 Canon, Inc. CanoScan N650U/N656U
Bus 001 Device 008: ID 04b3:301b IBM Corp. SK-8815 Keyboard
Bus 001 Device 004: ID 0557:8021 ATEN International Co., Ltd
Bus 001 Device 003: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
Bus 001 Device 011: ID 1941:8021 Dream Link WH1080 Weather Station / USB
Missile Launcher
Bus 001 Device 010: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port
Bus 001 Device 007: ID 05e3:0606 Genesys Logic, Inc. USB 2.0 Hub / D-Link
DUB-H4 USB 2.0 Hub
Bus 001 Device 006: ID 0baf:0303 U.S. Robotics
Bus 001 Device 002: ID 174c:2074 ASMedia Technology Inc.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
/lib/udev/rules.d/40-libsane.rules looks like it ought to be detecting
it ...
$ cat /lib/udev/rules.d/40-libsane.rules | grep 2206
ATTRS{idVendor}=="04a9", ATTRS{idProduct}=="2206", ENV{libsane_matched}="yes"
But I get nothing created in /dev ...
And trying to search for the scanner produces no results, though some
slightly odd looking intermediate debug information:
$ sudo SANE_DEBUG_SANEI_USB=255 sane-find-scanner
# sane-find-scanner will now attempt to detect your scanner. If the
# result is different from what you expected, first make sure your
# scanner is powered up and properly connected to your computer.
# No SCSI scanners found. If you expected something different, make sure that
# you have loaded a kernel SCSI driver for your SCSI adapter.
[sanei_debug] Setting debug level of sanei_usb to 255.
[sanei_usb] sanei_usb_init: marking existing devices
[sanei_usb] sanei_usb_init: Looking for kernel scanner devices
[sanei_usb] sanei_usb_init: can't stat /dev/usb/: No such file or directory
[sanei_usb] sanei_usb_init: initializing libusb-1.0
[sanei_usb] sanei_usb_init: Looking for libusb-1.0 devices
[sanei_usb] sanei_usb_init: device 0x174c/0x3074, interface 0 doesn't look like
a scanner (9/9)
[sanei_usb] sanei_usb_init: device 0x174c/0x3074 at 002:002: no suitable
interfaces
[sanei_usb] sanei_usb_init: device 0x1d6b/0x0003, interface 0 doesn't look like
a scanner (9/9)
[sanei_usb] sanei_usb_init: device 0x1d6b/0x0003 at 002:001: no suitable
interfaces
[sanei_usb] sanei_usb_init: found libusb-1.0 device (0x04a9/0x2206) interface 0
at libusb:001:012
[sanei_usb] store_device: add dn 0 with libusb:001:012
[sanei_usb] sanei_usb_init: device 0x04b3/0x301b, interface 0 doesn't look like
a scanner (0/3)
[sanei_usb] sanei_usb_init: device 0x04b3/0x301b, interface 1 doesn't look like
a scanner (0/3)
[sanei_usb] sanei_usb_init: device 0x04b3/0x301b, interface 2 doesn't look like
a scanner (0/3)
[sanei_usb] sanei_usb_init: device 0x04b3/0x301b at 001:008: no suitable
interfaces
[sanei_usb] sanei_usb_init: device 0x0557/0x8021, interface 0 doesn't look like
a scanner (9/9)
[sanei_usb] sanei_usb_init: device 0x0557/0x8021 at 001:004: no suitable
interfaces
[sanei_usb] sanei_usb_init: device 0x05e3/0x0608, interface 0 doesn't look like
a scanner (9/9)
[sanei_usb] sanei_usb_init: device 0x05e3/0x0608 at 001:003: no suitable
interfaces
[sanei_usb] sanei_usb_init: device 0x1941/0x8021, interface 0 doesn't look like
a scanner (0/3)
[sanei_usb] sanei_usb_init: device 0x1941/0x8021 at 001:011: no suitable
interfaces
[sanei_usb] sanei_usb_init: found libusb-1.0 device (0x067b/0x2303) interface 0
at libusb:001:010
[sanei_usb] store_device: add dn 1 with libusb:001:010
[sanei_usb] sanei_usb_init: device 0x05e3/0x0606, interface 0 doesn't look like
a scanner (9/9)
[sanei_usb] sanei_usb_init: device 0x05e3/0x0606 at 001:007: no suitable
interfaces
[sanei_usb] sanei_usb_init: device 0x0baf/0x0303, interface 0 doesn't look like
a scanner (2/2)
[sanei_usb] sanei_usb_init: device 0x0baf/0x0303, interface 1 doesn't look like
a scanner (2/10)
[sanei_usb] sanei_usb_init: device 0x0baf/0x0303 at 001:006: no suitable
interfaces
[sanei_usb] sanei_usb_init: device 0x174c/0x2074, interface 0 doesn't look like
a scanner (9/9)
[sanei_usb] sanei_usb_init: device 0x174c/0x2074 at 001:002: no suitable
interfaces
[sanei_usb] sanei_usb_init: device 0x1d6b/0x0002, interface 0 doesn't look like
a scanner (9/9)
[sanei_usb] sanei_usb_init: device 0x1d6b/0x0002 at 001:001: no suitable
interfaces
[sanei_usb] sanei_usb_init: found 2 devices
[sanei_usb] sanei_usb_init: device 00 is libusb:001:012
[sanei_usb] sanei_usb_init: device 01 is libusb:001:010
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner0'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner0' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner1'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner1' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner2'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner2' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner3'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner3' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner4'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner4' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner5'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner5' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner5'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner5' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner7'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner7' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner8'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner8' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner9'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner9' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner10'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner10' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner11'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner11' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner12'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner12' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner13'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner13' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner14'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner14' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usb/scanner15'
[sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner15' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner0'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner0' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner1'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner1' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner2'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner2' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner3'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner3' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner4'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner4' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner5'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner5' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner6'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner6' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner7'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner7' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner8'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner8' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner9'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner9' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner10'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner10' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner11'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner11' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner12'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner12' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner13'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner13' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner14'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner14' in list
[sanei_usb] sanei_usb_open: trying to open device `/dev/usbscanner15'
[sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner15' in list
# No USB scanners found. If you expected something different, make sure that
# you have loaded a kernel driver for your USB host controller and have setup
# the USB system correctly. See man sane-usb for details.
# Not checking for parallel port scanners.
# Most Scanners connected to the parallel port or other proprietary ports
# can't be detected by this program.
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https://bugs.launchpad.net/bugs/1312594
Title:
14.04 won't detect common USB scanner
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