I've been asked to enable xhci dynamic debugging (xhci_hcd) with the
latest mainline kernel to provide better information about the problem.
Can you please tell how to do that - which console command I'd have to
input or which files I'd have to alter - I can't seem to get it -
googled around a bit.

And after enabling it - they would need the output of grepping xhci
and/or usb from kern.log right?

** Tags removed: kernel-bug-exists-upstream-3.15-rc7
** Tags added: kernel-bug-exists-upstream-3.15-rc8

** Changed in: linux (Ubuntu)
       Status: Triaged => Incomplete

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https://bugs.launchpad.net/bugs/1319443

Title:
  046d:082d Logitech c920 usb webcam not working when plugged into USB
  3.0 port

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