I try to use 2 scanners (the same ones). I connect the two usb, switch on the computer and then :
va2@va2-desktop:~$ lsusb Bus 005 Device 001: ID 0000:0000 Bus 004 Device 001: ID 0000:0000 Bus 003 Device 005: ID 04a9:220d Canon, Inc. CanoScan N670U/N676U/LiDE 20 Bus 003 Device 001: ID 0000:0000 Bus 001 Device 004: ID 04a9:220d Canon, Inc. CanoScan N670U/N676U/LiDE 20 Bus 001 Device 001: ID 0000:0000 Bus 002 Device 002: ID 046d:c016 Logitech, Inc. M-UV69a Optical Wheel Mouse Bus 002 Device 001: ID 0000:0000 (note that at each switch on on the computer the bus and order could change) I test to scan "one", it works va2@va2-desktop:~$ SANE_DEBUG=255 USB_DEBUG=255 time scanimage --device-name plustek:libusb:003:005 --verbose >test.tiffusb_set_debug: Setting debugging level to 255 (on) usb_os_init: Found USB VFS at /dev/bus/usb usb_os_find_busses: Skipping non bus directory devices usb_os_find_busses: Found 005 usb_os_find_busses: Found 004 usb_os_find_busses: Found 003 usb_os_find_busses: Found 001 usb_os_find_busses: Found 002 usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 001 on 005 error obtaining child information: Operation not permitted usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 001 on 004 error obtaining child information: Operation not permitted usb_os_find_devices: Found 005 on 003 usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 001 on 003 error obtaining child information: Inappropriate ioctl for device error obtaining child information: Operation not permitted usb_os_find_devices: Found 004 on 001 usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 001 on 001 error obtaining child information: Inappropriate ioctl for device error obtaining child information: Operation not permitted usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 002 on 002 skipped 1 class/vendor specific interface descriptors usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 001 on 002 error obtaining child information: Operation not permitted error obtaining child information: Operation not permitted scanimage: scanning image of size 202x150 pixels at 24 bits/pixel scanimage: acquiring RGB frame scanimage: received signal 2 scanimage: trying to stop scanner scanimage: min/max graylevel value = 255/0 scanimage: sane_read: Operation was cancelled Command exited with non-zero status 2 0.00user 0.01system 0:10.09elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+557minor)pagefaults 0swaps then I test scan "two", it fails... (what is funny is the scanner one is moving a little bit when I try to scan on the scanner two) va2@va2-desktop:~$ SANE_DEBUG=255 USB_DEBUG=255 time scanimage --device-name plustek:libusb:001:004 --verbose >test.tiff usb_set_debug: Setting debugging level to 255 (on) usb_os_init: Found USB VFS at /dev/bus/usb usb_os_find_busses: Skipping non bus directory devices usb_os_find_busses: Found 005 usb_os_find_busses: Found 004 usb_os_find_busses: Found 003 usb_os_find_busses: Found 001 usb_os_find_busses: Found 002 usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 001 on 005 error obtaining child information: Operation not permitted usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 001 on 004 error obtaining child information: Operation not permitted usb_os_find_devices: Found 005 on 003 usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 001 on 003 error obtaining child information: Inappropriate ioctl for device error obtaining child information: Operation not permitted usb_os_find_devices: Found 004 on 001 usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 001 on 001 error obtaining child information: Inappropriate ioctl for device error obtaining child information: Operation not permitted usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 002 on 002 skipped 1 class/vendor specific interface descriptors usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 001 on 002 error obtaining child information: Operation not permitted error obtaining child information: Operation not permitted scanimage: open of device plustek:libusb:001:004 failed: Error during device I/O Command exited with non-zero status 1 0.00user 0.00system 0:00.28elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+339minor)pagefaults 0swaps then I disconnect the scanner "one" from usb: Bus 005 Device 001: ID 0000:0000 Bus 004 Device 001: ID 0000:0000 Bus 003 Device 001: ID 0000:0000 Bus 001 Device 004: ID 04a9:220d Canon, Inc. CanoScan N670U/N676U/LiDE 20 Bus 001 Device 001: ID 0000:0000 Bus 002 Device 002: ID 046d:c016 Logitech, Inc. M-UV69a Optical Wheel Mouse Bus 002 Device 001: ID 0000:0000 then the previous command to scan on scanner "two" is now working well: va2@va2-desktop:~$ SANE_DEBUG=255 USB_DEBUG=255 time scanimage --device-name plustek:libusb:001:004 --verbose >test.tiff usb_set_debug: Setting debugging level to 255 (on) usb_os_init: Found USB VFS at /dev/bus/usb usb_os_find_busses: Skipping non bus directory devices usb_os_find_busses: Found 005 usb_os_find_busses: Found 004 usb_os_find_busses: Found 003 usb_os_find_busses: Found 001 usb_os_find_busses: Found 002 usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 001 on 005 error obtaining child information: Operation not permitted usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 001 on 004 error obtaining child information: Operation not permitted usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 001 on 003 error obtaining child information: Operation not permitted usb_os_find_devices: Found 004 on 001 usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 001 on 001 error obtaining child information: Inappropriate ioctl for device error obtaining child information: Operation not permitted usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 002 on 002 skipped 1 class/vendor specific interface descriptors usb_os_find_devices: couldn't get connect info usb_os_find_devices: Found 001 on 002 error obtaining child information: Operation not permitted error obtaining child information: Operation not permitted scanimage: scanning image of size 202x150 pixels at 24 bits/pixel scanimage: acquiring RGB frame scanimage: min/max graylevel value = 0/255 scanimage: read 90900 bytes in total 0.01user 0.00system 0:29.12elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+605minor)pagefaults 0swaps conclusion: -there is a problem -I would say that the initialisation procedure of the plustek backend doesn't refer completely to the parameter --device-name plustek:libusb:0xx:0yy and proceed some command to the wrong scanner, then the continuation of the procedure is corrupted and it fails -I have ubuntu 6.10, and the error is working with several different computers. How to arrange that ? :-) Xavier. ____________________________________________________________________________________ Expecting? Get great news right away with email Auto-Check. Try the Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/newmail_tools.html
