I found debug commands and here is the output:
[sanei_debug] Setting debug level of sanei_usb to 127.
[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: Looking for libusb devices
usb_set_debug: Setting debugging level to...
This scanner worked a week ago, then after a Fedora 11 upgrade, it stopped. The error on screen is:
failed to open device 'snapscan:libusb:001:003' invalid argument
sane-find-scanner finds the scanner as:
found USB scanner (vendor=0x04b8 [EPSON], product=0x0122 [EPSON Scanner]) at libusb:001:003
scanimage -L reports:
scanimage: no SANE devices found
dmesg:
usb 1-5: usbfs: interface 0...
