linux-kernel - Re: regression in 2.6.27.45 with usb and suspend-to-disk

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Date:	Wed, 3 Feb 2010 13:09:45 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Corey Wright <undefined@...ox.com>
cc:	Greg KH <gregkh@...e.de>, <stable@...nel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: regression in 2.6.27.45 with usb and suspend-to-disk

On Wed, 3 Feb 2010, Corey Wright wrote:

> > Please build a kernel with CONFIG_USB_DEBUG enabled and post a dmesg 
> > log showing the problem during the second hibernation attempt.
> 
> [  675.443474] PM: Syncing filesystems ... done.
> [  675.576353] Freezing user space processes ... (elapsed 0.00 seconds)
> done.
> [  675.606968] Freezing remaining freezable tasks ... (elapsed 0.00
> seconds) done.
> [  675.629249] PM: Shrinking memory...  .-.\.|.done (3129 pages freed)
> [  679.547522] PM: Freed 12516 kbytes in 3.90 seconds (3.20 MB/s)
> [  679.565065] Suspending console(s) (use no_console_suspend to debug)
> [  679.585425] uhci_hcd 0000:00:10.0: release dev 2 ep81-INT, period 8,
> phase 4, 118 us
> [  679.585453] hub 2-0:1.0: hub_suspend
> [  679.585460] usb usb2: bus suspend
> [  679.585463] usb usb2: suspend_rh
> [  679.585534] hub 1-0:1.0: hub_suspend
> [  679.585538] usb usb1: bus suspend
> [  679.585542] ehci_hcd 0000:00:10.4: suspend root hub
> [  679.585547] ehci_hcd 0000:00:10.4: suspend failed because port 8 is
> resuming

There you have it.  What is the USB device attached to port 8 on bus 1 
(i.e., /sys/bus/usb/devices/1-8)?

And what happens if you do:

	echo disabled >/sys/bus/usb/devices/1-8/power/wakeup

before trying to hibernate?

Alan Stern

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