linux-kernel - Re: broken suspend [Was: 2.6.24-rc2-mm1]

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Message-Id: <200711172137.18784.rjw@sisk.pl>
Date:	Sat, 17 Nov 2007 21:37:18 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	Alan Stern <stern@...land.harvard.edu>, Greg KH <greg@...ah.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>
Subject: Re: broken suspend [Was: 2.6.24-rc2-mm1]

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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