Samsung SCX-4x21.
Дело такое, есть мнение, что после первого обращения к сканеру тот делает suspend и из него не выходит.
valdos-desk devices # 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.
found USB scanner (vendor=0x04e8 [Samsung], product=0x3419 [SCX-4x21 Series]) at libusb:002:014
# 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.
valdos-desk devices # scanimage -L
device `xerox_mfp:libusb:002:014' is a SAMSUNG ORION multi-function peripheral
valdos-desk devices # 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).
valdos-desk devices #
то есть девайс после обращения засыпает и гудбай.
Как вылечить такое свинское поведеные? «USB selective device suspend/resume» выключен в ядре
