Re: usb2: scanner no longer working

On Friday 07 November 2008, Stefan Ehmann wrote:
> I recompiled sane-backends and linked it against libusb20. The include path
> needed to be fixed.
>
> scanimage -L doesn't detect any scanners.
>
> sane-find-scanner correctly detects it on first run:
> found USB scanner (vendor=0x04a9 [Canon], product=0x221c [CanoScan],
> chip=GL842) at libusb:/dev/usb:/dev/ugen3.2
>
> on subsequent runs no scanners are found
>
> dmesg only says
> ugen3.2: <Canon> at usbus3
>
> no ugen detached message even if I unplug the scanner
>
> I tried some of the debugging sysctls but I couldn't spot anything useful.
>
> ugen seems to work in general as I could access my camera with libgphoto2.
>
> Will provide more info as needed.

Hi Stefan,

Which version/date is the libusb20 you are using?

Does usbconfig list your device?

Try changing ownership of the USB devices? Maybe it is a permissions problem.

usbconfig -u xx -a xx set_owner xx:yy

--HPS