I would like to confirm what Dimitrios said.  In my case, I found:
/sys/bus/usb/devices/1-1/power/level = on
This device is my integrated webcam.  Now the question is, what is the 
solution?  I can set it to "auto" manually, of course (like in my rc.local), 
but is there no way to set it as the default for this device?  I didn't see a 
way to set power/level as any module option, especially for a specific device.

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Powertop makes wrong suggestion to add usbcore.autosuspend=1
https://bugs.launchpad.net/bugs/136549
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