linux-kernel - 2.6.25-rc7/rc8 USB dead on resume

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Date:	Wed, 02 Apr 2008 11:05:21 -0400
From:	Mark Lord <lkml@....ca>
To:	Oliver Neukum <oliver@...kum.org>
Cc:	Pavel Machek <pavel@...e.cz>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>, jikos@...e.cz,
	Alan Stern <stern@...land.harvard.edu>,
	linux-usb@...r.kernel.org
Subject: 2.6.25-rc7/rc8 USB dead on resume

Mark Lord wrote:
> (CCing linux-usb again)
> (CCing Alan Stern on this sub-thread)
> 
> Oliver Neukum wrote:
>> Am Montag, 31. März 2008 21:21:45 schrieb Mark Lord:
>>> Oliver Neukum wrote:
>>>> But if power is cut with newer kernels and older kernels retain it, 
>>>> something
>>>> must have changed. Can you undo the ACPI changes since the last working
>>>> kernel?
>>> ..
>>>
>>> No, that's no different.
>>> This notebook always cuts +5V from USB on suspend or poweroff.
>>> Regardless of kernel version.  I don't know how common this is,
>>> but all of my notebooks here have always behaved this way,
>>> as have most (but not all) of the larger systems.
>>>
>>> The two most recent PCIe motherboards I have here
>>> do provide +5V standby power to USB, even when "OFF",
>>> much to my annoyance and to the detriment of this planet.
>>
>> Very well.
>>
>> Mark, can you get a sysrq-t trace of your whole system when USB goes
>> dead? And please enable CONFIG_USB_DEBUG. We need to do whether
>> khubd and ksuspend_usbd are in state D.
> ..
> 
> Both of those things were already done, and results from the last time
> are attached to the bugzilla report: 
> http://bugzilla.kernel.org/show_bug.cgi?id=10345
> 
> I'll be installing -rc8 today, and see what happens there.
..

No change in -rc8.  I've uploaded new syslog (with alt-sysrq-T) and .config
as attachements to the bugzilla entry:

    http://bugzilla.kernel.org/show_bug.cgi?id=10345

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