Created attachment 863753 [details]
Initial attachment - contents described in initial post

Hi,

To save energy, I started suspending my laptop.  This new behavior uncovered a
minor software defect.

Occasionally, upon resumption a USB controller fails to resume.  It manifests
itself by my phone no longer recognized by the O/S.

Attached is a tar-ball with the following files:

o dmesg snippet (grep xhci_hcd)
o lsusb -vt:
  + working.usb.no.phone - working, no phone connected
  + working.usb.phone - working, phone connected
  + not.working* - not working, etc.