From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Jiri Slaby <jirislaby@gmail.com>
Subject: Re: broken suspend [Was: 2.6.24-rc2-mm1]
Date: Sat, 17 Nov 2007 21:37:18 +0100
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Cc: Alan Stern <stern@rowland.harvard.edu>, Greg KH <greg@kroah.com>,
       Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org,
       Linux-pm mailing list <linux-pm@lists.linux-foundation.org>
References: <Pine.LNX.4.44L0.0711161058170.2738-100000@iolanthe.rowland.org> <473F03DF.4020306@gmail.com>
In-Reply-To: <473F03DF.4020306@gmail.com>
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On Saturday, 17 of November 2007, Jiri Slaby wrote:
> On 11/16/2007 05:10 PM, Alan Stern wrote:
> > On Thu, 15 Nov 2007, Greg KH wrote:
> > 
> >>> The offending -mm patch is
> >>> gregkh-driver-pm-acquire-device-locks-prior-to-suspending.patch
> >>>
> >>> 2.6.24-rc2-mm1 minus it works just fine; PROVE_LOCKING shows nothing new when
> >>> the patch is applied.
> >> Thanks for tracking this down.  Alan, any thoughts?
> > 
> > It's a driver problem somewhere.  Probably not one of the most common 
> > drivers because I don't see the same problem here (but then I'm not 
> > testing -mm).
> > 
> > The thing to do is figure out which driver is causing the problem.
> > Jiri, try enabling CONFIG_DEBUG_DRIVER.  
> 
> Sadly no output.
> 
> > If there's also a config 
> > option to prevent the console from being suspended, set it as well.  
> 
> no_suspend_console kernel parameter has no effect (why?).

I'm not sure.

Please try to set CONFIG_PM_VERBOSE.
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