[sane-devel] epson 2400 photo: scanimage -L error

[Karl Heinz Kremer]

As Henning already suggested, try it as root user. Chances are that=20
your hotplug system is not setting the permissions on the device file=20
correctly.

Also, make sure that you have this line in your epson.conf file:
usb

Make sure that you only have one Sane installation on your system.


On Dec 29, 2004, at 10:11 AM, r k wrote:

> My problem is that sane-find-scanner finds my scanner,
>
> but scanimage -L doesn't.
> I also don't get a clue where to look for solving this
> problem.
> I already read all kinds of manpages and
> documentation,
> and googled for hours on this problem.
>
> Curious is that with linux 2.4.28 and module scanner
> everything works
> just fine. But it is impractical to run mostly linux
> 2.6 and only for scanning
> linux 2.4.
>
> A bad sign is that with the knoppix cd the scanner
> also only works
> on linux 2.4, not linux 2.6, which is called
> 'experimental' there.
>
> Other usb devices work normally, e.g., the usb memory
> stick within a digital
> still camera.
>
> I tried to read some sane source code, but it seems
> impossible to find out
> how and where scanimage tries to open devices. Sane
> doesn't look that simple.
> Curious is that I couldn't get any debug output from
> scanimage,
> as shown below.
>
> I would be very greatful for any hints on this
> problem.
>
> Greetings, Roland
>
> NB: here are some details of my setup.
>
> Linux 2.6.9
> Debian sarge
> sane 1.0.13, libsane/libsane-dev/sane-utils 1.0.15
> usb 1 without ehci_hcd, with module uhci_hcd, usbcore
>
> export SANE_DEBUG_DLL=3D255
> export SANE_DEBUG_EPSON=3D255
> export SANE_DEBUG_SANEI_USB=3D10
> sane-find-scanner
> -->
> stdout: found USB scanner (vendor=3D0x04b8,
> product=3D0x011b) at libusb:002:002
> stderr:
> [sanei_usb] sanei_usb_init: couldn't open
> /dev/usbscanner: No such device
> [sanei_usb] sanei_usb_init: couldn't open
> /dev/usb/scanner0: No such device
> ...
> [sanei_usb] sanei_usb_init: couldn't open
> /dev/usb/scanner15: No such device
> ...
> [sanei_usb] sanei_usb_init: found libusb device
> (0x04b8/0x011b) interface 0  at libusb:002:002
> [sanei_usb] sanei_usb_init: found 1 devices
> [sanei_usb] sanei_usb_open: trying to open device
> `/dev/usb/scanner'
> [sanei_usb] sanei_usb_open: can't find device
> `/dev/usb/scanner' in list
>   idem for /dev/usb/scanner0..15
> USB error: error sending control message: Operation
> not permitted
>  (this error was printed 8 times)
>
> scanimage -L
> --> No scanners were identified.
>  (no debug output)
>
>
>
> 	=09
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