linux-kernel - Re: [usb resume regression] in 3.16-rc1

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Message-ID: <Pine.LNX.4.44L0.1406191331070.1247-100000@iolanthe.rowland.org>
Date:	Thu, 19 Jun 2014 13:35:49 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Jörg Otte <jrg.otte@...il.com>
cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	USB list <linux-usb@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [usb resume regression] in 3.16-rc1

On Thu, 19 Jun 2014, Jörg Otte wrote:

> I don't know how to do this.

To enable dynamic debugging (as root):

    echo 'module usbcore =p' >/sys/kernel/debug/dynamic_debug/control
    echo 'module ehci_hcd =p' >/sys/kernel/debug/dynamic_debug/control

Do this before you carry out the suspend, and post the resulting dmesg 
log.

Alan Stern

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