Canon LIDE25 does not work anymore (did work before)

• os: debian testing kde
• libsane version: 1.0.31-2
• scanner :Canon LIDE 25 (used to work without any problems)
• lsusb: scanner is found
• sane-find-scanner: scanner is found
• scanimage -L: no scanners found see code below

peer@debian:~$ lsusb
Bus 005 Device 003: ID 05e3:0723 Genesys Logic, Inc. GL827L SD/MMC/MS Flash Card Reader
Bus 005 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 007 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 004: ID 04a9:2220 Canon, Inc. CanoScan LIDE 25
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 004: ID 046d:c408 Logitech, Inc. Marble Mouse (4-button)
Bus 003 Device 003: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
Bus 003 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
peer@debian:~$ 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.

could not open USB device 0x05e3/0x0723 at 005:003: Access denied (insufficient permissions)
could not open USB device 0x8087/0x0024 at 005:002: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0002 at 005:001: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0002 at 007:001: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0001 at 006:001: Access denied (insufficient permissions)
found USB scanner (vendor=0x04a9 [Canon], product=0x2220 [CanoScan], chip=LM9832/3) at libusb:004:004
could not open USB device 0x1d6b/0x0001 at 004:001: Access denied (insufficient permissions)
could not open USB device 0x046d/0xc408 at 003:004: Access denied (insufficient permissions)
could not open USB device 0x0a12/0x0001 at 003:003: Access denied (insufficient permissions)
could not open USB device 0x8087/0x0024 at 003:002: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0002 at 003:001: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0003 at 002:001: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0002 at 001:001: Access denied (insufficient permissions)
  # Your USB scanner was (probably) detected. It may or may not be supported by
  # SANE. Try scanimage -L and read the backend's manpage.

  # Not checking for parallel port scanners.

  # Most Scanners connected to the parallel port or other proprietary ports
  # can't be detected by this program.

  # You may want to run this program as root to find all devices. Once you
  # found the scanner devices, be sure to adjust access permissions as
  # necessary.
peer@debian:~$ scanimage -L

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).