i have proplem with xsane my scanner is BENQ 4300 distro is suse 10.0 scanimage (sane-backends) 1.0.15; backend version 1.0.15 i get that error Failed to open device snapscan ;linusb :004:008 error during device I/O any one could help me hey guysss are u as root? yes what si soutput of scanimage -L? paragn: yes i am root paragn device `snapscan:libusb:004:010' is a Acer FlatbedScanner22 flatbed scanner paragn: device `snapscan:libusb:004:010' is a Acer FlatbedScanner22 flatbed scanner gimme output of scanimage -L after you did SANE_DEBUG_SNAPSCAN=255 on http://pastebin.ca mohammed, that gave more debug messages to analyze probelm paragn: it gave me the same out out not a debug info device `snapscan:libusb:004:010' is a Acer FlatbedScanner22 flatbed scanner howz that possible? it must give u more messages oh i think you have not used export word export SANE_DEBUG_SNAPSCAN=255 give above line on console and see output of scanimage -L paragn: http://pastebin.ca/71903 mohammed, gimme /sbin/lsusb output here bash: /sbin/lsusb: No such file or directory lsusb Bus 005 Device 001: ID 0000:0000 Bus 004 Device 010: ID 04a5:20b0 Acer Peripherals Inc. (now BenQ Corp.) S2W 3300U/4300U Bus 004 Device 001: ID 0000:0000 Bus 003 Device 005: ID 03f0:0324 Hewlett-Packard Bus 003 Device 004: ID 046d:c016 Logitech, Inc. Optical Mouse Bus 003 Device 001: ID 0000:0000 Bus 002 Device 001: ID 0000:0000 Bus 001 Device 001: ID 0000:0000 lsusb output is ok debug messages said that driver is not able to find /dev/usb/scanner0 can u check ls /dev/usb/scanner0 -lrt output?? paragn: the I/O error i get in the first time i try to use xsane after that xsane tell me no device found whether that file really exists or not? check /dev/usb/scanner0 is present or not? paragn: /dev/usb doesnot exist ok then you need to add onemore export variable to check why device is not created give me the cmd paragn: you there..? export SANE_DEBUG_SANEI_USB=255 and reupload scanimage -L output remember both export must be in shell environment and then execute scanimage -L paragn: here you are http://pastebin.ca/71917 mohammed, so it seems backend is unable to create device file but it can detect it yes so what i ahve to do..? mohammed, locate snapscan.conf fiel on ur system its on /etc/sane.d most probably in /etc/sane.d/snapscan.conf open it and remove # in front of line # /dev/usb/scanner0 bus=usb and check scanimage -L is there really # in snapscan.conf file?? no For USB scanners also specify bus=usb, e.g. /dev/usb/scanner0 bus=usb is there also lfollowing lines? # Benq/Acer/Vuego 4300 usb 0x04a5 0x20de .# Benq/Acer/Vuego 3300 / 4300 usb 0x04a5 0x20b0 # Benq/Acer/Vuego 4300 usb 0x04a5 0x20de ohh all things are present and still scanner is not working i had almost a week trying to do it what els could cause that proplem..? hey which scanner u have?? Benq 4300 scanimage -L output showed USB IDs from Benq 3300 and i add the firmwire file line on snapscan.conf isnt it? # [sanei_usb] sanei_usb_init: found libusb device (0x04a5/0x20b0) interface 0 at libusb:004:011 that is 4300 # Benq/Acer/Vuego 3300 / 4300 usb 0x04a5 0x20b0 # Benq/Acer/Vuego 4300 usb 0x04a5 0x20de Benq/Acer/Vuego 3300 / 4300 usb 0x04a5 0x20b0 Benq/Acer/Vuego 3300 / 4300 usb 0x04a5 0x20b0 ohh there r 2 Devices sharing same USB IDs i mean 4300 also have same as 3300 yes have u gone thru' http://snapscan.sourceforge.net/ yes every thing i did if yes/no then you can contact maintainer of snapscan backend drop a mail on mailing list thank you for your help but i searched the maillist and found some popl had the same eroor msg i got and noone answer them what u think i think you must drop amail to Oliver u know his e-mail..? mohammed, may be this mail can be usefule to u http://lists.alioth.debian.org/pipermail/sane-devel/2004-September/012121.html oliverschwartz@users.sourceforge.net i have the newset sane backend with lsus support http://lists.alioth.debian.org/pipermail/sane-devel/2006-March/016435.html see Oliver reply u also send him full debug messages why dont u try new sourcecode ? the sane i sue came with my distro and i not ready to go into un comptabile widitro headace ok then u can send mail to Oliver and wait for his reply ok would u give me the mailling list mail to to add it on the CC ok sane-devel@lists.alioth.debian.org * POSIX (n=mohammed@196.218.11.99) has joined #sane paragn: iam mohamed sorry power failuer would u give me the log of our conversation..? ok wait will upload it on pastbin.ca