linux-kernel - Re: 2.6.25-rc7: Ugh.

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Message-Id: <200804021004.53453.oliver@neukum.org>
Date:	Wed, 2 Apr 2008 10:04:52 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	Mark Lord <lkml@....ca>
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
Subject: Re: 2.6.25-rc7:  Ugh.

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
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