linux-kernel - Re: [Regression] USB wakeup problem on Toshiba Portege R500

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Date:	Thu, 8 Jan 2009 09:49:33 +0100
From:	Oliver Neukum <oliver@...kum.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Alan Stern <stern@...land.harvard.edu>, Greg KH <greg@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Pavel Machek <pavel@...e.cz>
Subject: Re: [Regression] USB wakeup problem on Toshiba Portege R500

Am Thursday 08 January 2009 08:35:39 schrieb Rafael J. Wysocki:
> Hi Alan,
> 
> Unfortunately, the following commit:
> 
> commit 6fd9086a518d4f14213a32fe6c9ac17fabebbc1e
> Author: Alan Stern <stern@...land.harvard.edu>
> Date:   Wed Dec 17 17:20:38 2008 -0500
> 
>     USB: automatically enable wakeup for PCI host controllers
> 
>     Signed-off-by: Alan Stern <stern@...land.harvard.edu>
>     Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
> 
> causes a regression to appear on my Toshiba Portege R500.
> 
> The regression is that when suspended to RAM, the box wakes up immediately
> unless 'disabled' is written into the /sys/devices/.../power/wakeup file of the

Even without attached devices?

> EHCI controller.  I know of at least 10 different boxes out there that are
> going to have similar problems forcing their users to use manual workaround.
> 
> Also, it wakes up on a USB mouse activity, which I don't want it to do, so in
> fact I have to write 'disabled' to the /sys/devices/.../power/wakeup files of
> all USB controllers.

We do support remote wakeup from PS2 keyboards. So you might argue we
should do the same for USB HID devices.

	Regards
		Oliver


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