Hi,
I've been asked to contact this mailing list regarding
https://bugzilla.kernel.org/show_bug.cgi?id=42784:
Using the same configuration (kernel-3.3-rc4 and older versions), Canon
CanoScan LiDE 20 USB scanner works on the USB-2.0 port, but not on USB-3.0.
usb 5-1: usbfs: interface 0 claimed by usbfs while 'scanimage' sets
config #1
This message is not printed when using USB-2.0.
scanimage -L:
No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
lsusb:
Bus 001 Device 005: ID 04a9:220d Canon, Inc. CanoScan N670U/N676U/LiDE 20
The scanner can be reset using the reset code from
https://bugzilla.redhat.com/show_bug.cgi?id=723696 after adapting the
vendor_id and product_id to match those of the Canon scanner:
usb 5-1: new full-speed USB device number 3 using xhci_hcd
usb 5-1: usbfs: interface 0 claimed by usbfs while 'scanimage' sets
config #1
usb 5-1: reset full-speed USB device number 3 using xhci_hcd
xhci_hcd 0000:05:00.0: xHCI xhci_drop_endpoint called with disabled ep
ffff880419ba0e40
The next scanimage -L successfully detects the scanner:
scanimage -L
device `plustek:libusb:005:003' is a Canon CanoScan N670U/N676U/LiDE20
flatbed scanner
Unfortunately, it will stop working after a while; There will be
messages like "usb 5-1: usbfs: process 12345 (scanbuttond) did not claim
interface 0 before use" on repeated use.
If I'm not mistaken, the USB3 chipset is an Etrontech EJ168A (AsRock P67
Extreme 4 Gen2).
Why does usbfs claim the device on USB-3, but not on USB-2? What's wrong
here, is there a way to solve it, what can I do about it?
Best regards,
Harald
--
`Experience is the best teacher.'
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