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From: Oliver Neukum <oliver@neukum.org>
Organization: Novell
To: Mark Lord <lkml@rtr.ca>
Subject: Re: 2.6.25-rc7:  Ugh.
Date: Wed, 2 Apr 2008 10:04:52 +0200
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Cc: Pavel Machek <pavel@suse.cz>, Linux Kernel <linux-kernel@vger.kernel.org>,
       Greg KH <gregkh@suse.de>, Andrew Morton <akpm@linux-foundation.org>,
       jikos@suse.cz
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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.

	Regards
		Oliver