I have the same problem with the Suyin camera (as mentioned by Alexander above).
Running the following for my camera
echo disabled >/sys/bus/usb/devices/1-2/power/wakeup
fails with "invalid argument" (it works for the autosuspend file of the same device)
cat /sys/bus/usb/devices/1-2/power/wakeup
displays an empty line
I have the same problem with the Suyin camera (as mentioned by Alexander above).
Running the following for my camera usb/devices/ 1-2/power/ wakeup
echo disabled >/sys/bus/
fails with "invalid argument" (it works for the autosuspend file of the same device)
cat /sys/bus/ usb/devices/ 1-2/power/ wakeup
displays an empty line