usb 3-3: configuration #1 chosen from 2 choices drivers/usb/class/cdc-acm.c: need inactive config #2 drivers/usb/class/cdc-acm.c: need inactive config #2
Until we get more intelligence somewhere, do this:
# cd /sys/bus/usb/devices/3-3 # echo '2' > bConfigurationValue #
That makes the device use vendor-neutral protocols to talk to the host, not MSFT-proprietary ones. (It's important to use the numbers from those messages; they will change if you use different USB ports.)
Hmm ... maybe usbcore would be better off with a less naive algorithm for choosing defaults. Like, preferring configurations without proprietary device protocols. That'd solve every cdc-acm case, and likely others.
- Dave
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