[sane-devel] How to detect USB scanners on linux?

[m. allan noah]

rupesh- commands you might be interested in:

tail /var/log/messages
dmesg | tail
lsusb
lsusb -v

use these before and after you connect the device, to make sure it shows 
up. if it does not, you have basic usb issues that you need to address 
first. i would suggest moving to a more recent linux, something with a 2.6 
kernel :)

if the device shows up, then i would suggest that you try to build a 
little libusb program, entirely outside of sane, that can find and talk to 
the scanner.

allan

On Tue, 13 Jun 2006, Rupesh Tarpara wrote:

> Hi,
>
> I am using Redhat AS 3, update 7. kernel string 2.4.21-40.EL.
>
> I am developing sane backend for USB hand held image scanner.
>
> Problem :-
>
> When I connect the USB device and run 'sane-find-scanner' command, it does
> not detect my usb scanner. It displays error message as, 'make sure usb host
> controller driver is installed and kernel scanner module is loaded'.
>
> 1) The files present in /dev/usb are :-
>
> scanner0   scanner10  scanner12  scanner14  scanner2   scanner4   scanner6
> scanner8
> scanner1   scanner11  scanner13  scanner15  scanner3   scanner5   scanner7
> scanner9
>
> 2) the files present in /etc/hotplug are :-
>
> blacklist          ieee1394.agent  pci        pci.rc  usb.agent
> usb.handmap  usb.usermap
> hotplug.functions  net.agent       pci.agent  usb     usb.distmap  usb.rc
>
> 3) output of lsmod is:-
>
> Module                  Size  Used by    Not tainted
> ide-cd                 33920   0  (autoclean)
> cdrom                  32416   0  (autoclean) [ide-cd]
> i810_audio             29784   0  (autoclean)
> ac97_codec             17736   0  (autoclean) [i810_audio]
> soundcore               6436   2  (autoclean) [i810_audio]
> agpgart                57752   6  (autoclean)
> audit                  89944   2  (autoclean)
> usbserial              23420   0  (autoclean) (unused)
> parport_pc             18756   1  (autoclean)
> lp                      8964   0  (autoclean)
> parport                36832   1  (autoclean) [parport_pc lp]
> autofs4                16152   0  (autoclean) (unused)
> e100                   28264   1
> mii                     4516   0  [e100]
> floppy                 56624   0  (autoclean)
> sg                     36236   0  (autoclean) (unused)
> scsi_mod              107180   1  (autoclean) [sg]
> microcode               5688   0  (autoclean)
> keybdev                 2944   0  (unused)
> mousedev                5524   1
> hid                    22244   0  (unused)
> input                   5888   0  [keybdev mousedev hid]
> ehci-hcd               20008   0  (unused)
> usb-uhci               25740   0  (unused)
> usbcore                77408   1  [usbserial hid ehci-hcd usb-uhci]
> ext3                   85864   2
> jbd                    50956   2  [ext3]
>
> ===========================================================================\
>
> can anyone guide me what is wrong? Where to look for usb scanner device
> file?
> is it necessary to install, usb-serial port emulator driver(kernel module)
> for scanner device on linux? (as usbserial module is already present)
>
> Thanks in advance,
>
> Rupesh Tarpara
>
>
>
>
>
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