[sane-devel] Kernel claiming device?

[Kerry Menzel]

I've been running as root and had changed the permissions by hand without a
reboot. I'm thinking that it's not a permissions problem, but instead, the
kernel has laid claim to the device. Any ideas on how to verify this and if
it's true, how to stop the kernel from claiming it?
 
Thanks,
Kerry
 
 
>try it as root. if this works, then you have a permissions problem on the 
>usb files in /proc. if you change the perms by hand, it will work, 
>but only until you next reboot or unplug the device. hotplug/udev can be 
>used to change these permanently.
> 
>allan
> 
On Thu, 29 Jun 2006, Kerry Menzel wrote:
 
> Hi,
> 
> 
> 
> I just bought an Avision AV220 scanner and I'm trying to get it going on
> 
> RedHat ES 4 (2.6.9-5.EL). When I run sane-find-scanner, it finds the
> 
> device at libusb:002:005. When I run scanImage -L, no scanners are
> 
> detected. I put things in debug mode and I got the following output. I'm
> 
> suspecting that the kernel has laid claim to the scanner. How do I get
> 
> SANE to control the scanner or should I do something else????
> 
> The permissions for /proc/bus/usb/002 are 777 and 666
> 
> for /proc/bus/usb/002/005
> 
> 
> 
> Thanks for the help!
> 
> 
> 
> [avision] sane_init: parsing config line "usb 0x0638 0x0a23"
> 
> [avision] sane_init: config file line 23: trying to attach USB:`usb
> 
> 0x0638 0x0a23'
> 
> [sanei_usb] sanei_usb_find_devices: vendor=0x0638, product=0x0a23
> 
> [avision] attach:
> 
> [avision] attach: opening libusb:002:005
> 
> [sanei_usb] sanei_usb_open: trying to open device `libusb:002:005'
> 
> Check that you have permissions to write to 002/005 and, if you don't,
> 
> that you set up hotplug (http://linux-hotplug.sourceforge.net/)
> 
> correctly.
> 
> USB error: could not claim interface 0: Device or resource busy
> 
> [sanei_usb] sanei_usb_open: libusb complained: could not claim interface
> 
> 0: Device or resource busy
> 
> [sanei_usb] Maybe the kernel scanner driver claims the scanner's
> 
> interface?
> 
> [avision] attach: open failed (Device busy)
> 
> [avision] sane_init: Trying to find USB device 638 a27 ...
> 
> 

 

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