linux-kernel - Re: [linux-pm] /proc/acpi/wakeup regression in 2.6.39-rc3

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Date:	Wed, 20 Apr 2011 22:57:35 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Tino Keitel <tino.keitel@....de>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	ACPI Devel Mailing List <linux-acpi@...r.kernel.org>,
	Linux PM mailing list <linux-pm@...ts.linux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [linux-pm] /proc/acpi/wakeup regression in 2.6.39-rc3

On Friday, April 15, 2011, Tino Keitel wrote:
> On Fri, Apr 15, 2011 at 10:38:47 -0400, Alan Stern wrote:
> > On Fri, 15 Apr 2011, Rafael J. Wysocki wrote:
> > 
> > > On Friday, April 15, 2011, Tino Keitel wrote:
> > > > Hi,
> > > > 
> > > > with 2.6.38, I enabled wakeup from suspend to RAM with the USB keyboard
> > > > this way:
> > > > 
> > > > echo USB2 > /proc/acpi/wakeup
> > > > 
> > > > This does not work anymore with 2.6.39-rc3. Wakeup using the keyboard
> > > > won't work, and the USB2 line in /proc/acpi/wakeup doesn't change to
> > > > "enabled" after the echo command.
> > > > 
> > > > Is this intended? If yes, what is the new way to enable keyboard
> > > > wakeup?
> > > 
> > > No, it's supposed to work IIRC.  I'll have a look at that code tomorrow.
> > 
> > Tino, can you check the contents of the power/wakeup files in the
> > appropriate sysfs directories?  That would be the directory for the
> > keyboard device itself and the directory for the USB host controller
> > for the bus the keyboard is on.
> > 
> > By default, power/wakeup should be "enabled" for the keyboard device 
> > and "disabled" for the host controller.  If you write "enabled" into 
> > the host controller's file by hand, does that fix the problem?
> 
> I already tried to write "enable" into all USB related wakeup files
> yesterday, not change.
> 
> I'll check again how these files look like in 2.6.38, what sysfs
> wakeup files change when writing into /proc/acpi/wakeup, and what
> differences to 2.6.39-rc can be seen.

Please post the contents of /proc/acpi/wakeup (without reverting the commits
you have identified as "bad").

Thanks,
Rafael
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