On Sunday 09 September 2007, Dan Johansson wrote:
> After upgrading to 2.6.22 one of my USB-devices stopped working "out of the
> box". I've found a workaround (see below) to get it working. And my
> question is how can I make this automatically?
>
> Here's the workaround:
>
> From dmesg:
> usb 2-1: new full speed USB device using uhci_hcd and address 4
> usb 2-1: no configuration chosen from 1 choice
>
>
> In /sys/bus/usb/devices/ I find the symlink for this device (2-1)
>
> /sys/bus/usb/devices/2-1# cat bNumConfigurations
> 1
> /sys/bus/usb/devices/2-1# cat bConfigurationValue
>
> by writing a value into bConfigurationValue, I can select an active
> configuration:
>
> /sys/bus/usb/devices/2-1# echo 1 > bConfigurationValue
> /sys/bus/usb/devices/2-1# cat bConfigurationValue
> 1
>
> After this the device works as expected.

I found myself a solution to this problem (I don't know if it's the best way 
to do it but it works for me).

I added the following two files to my system:

# cat /etc/udev/rules.d/00-local.rules
SUBSYSTEM=="usb", DRIVERS=="usb", 
ATTRS{serial}=="2f11211b-0e00-0106-6800-0050bf7a660c",
RUN+="/usr/local/bin/loox.udev"

# cat /usr/local/bin/loox.udev
#!/bin/bash

if [ ${ACTION} == "add" ]
then
        echo "1" > /sys/${DEVPATH}/bConfigurationValue
fi

-- 
Dan Johansson, <http://www.dmj.nu>
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