linux-kernel - Re: 2.6.22.6 + rt9: suspend/hibernate not working

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Message-Id: <1189108535.10587.11.camel@cmn3.stanford.edu>
Date:	Thu, 06 Sep 2007 12:55:35 -0700
From:	Fernando Lopez-Lezcano <nando@...ma.Stanford.EDU>
To:	Ingo Molnar <mingo@...e.hu>, Daniel Walker <dwalker@...sta.com>
Cc:	linux-kernel@...r.kernel.org, planetccrma@...ma.Stanford.EDU,
	Pavel Machek <pavel@....cz>
Subject: Re: 2.6.22.6 + rt9: suspend/hibernate not working

On Thu, 2007-09-06 at 11:42 -0700, Fernando Lopez-Lezcano wrote:
> On Tue, 2007-09-04 at 17:15 -0700, Daniel Walker wrote:
> > On Tue, 2007-09-04 at 17:12 -0700, Fernando Lopez-Lezcano wrote:
> > > Hi Ingo... I'm getting reports from some of my Planet CCRMA users (which
> > > I confirmed) that the latest rt kernel I released has broken suspend
> > > (tested on fc6 & fc7, stock Fedora kernel works fine - the rt
> > > configuration files are virtual clones as far as possible of the
> > > standard Fedora kernel config files). 
> > > 
> > > I don't know where to start debugging this. When suspend is initiated it
> > > freezes with a "Stopping tasks ... " message in the text console - a
> > > hard power cycle is the only way to get the machine back to normal. 
> > > 
> > > kernel/power/process.c seems to contain that string in the
> > > freeze_processes function so it looks like the freezer is not freezing
> > > tasks as no "done" message is ever printed. 
> > > 
> > > What could we do to help?
> > 
> > If you have high resolution timers enabled you could try disabling it,
> > and see if the problem persists .
> 
> The problem is still there ("Stopping tasks ... " and nothing
> afterwards). 

Looks like it was a known problem (sorry about the noise), see:
  http://lkml.org/lkml/2007/8/25/117

It does fix the problem here as well. 
Ingo: is this still the right fix for 2.6.22.6 + rt9?

-- Fernando


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