linux-kernel - Re: Regression between 2.6.35 and 2.6.38 (freeze at resume)

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Date:	Wed, 21 Sep 2011 14:29:19 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Éric Brunet <Eric.Brunet@....ens.fr>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Regression between 2.6.35 and 2.6.38 (freeze at resume)

At Tue, 20 Sep 2011 22:06:35 +0200,
Éric Brunet wrote:
> 
> I reported a bug three days ago about my computer occasionaly not waking up 
> (see below) and I have since compiled several kernels to see when the bug 
> arrived.
> 
> Till now, I have seen the bug trigger on a vanilla 2.6.39-rc3. (Only once, in 
> about ten suspend/resume) and I haven't seen it trigger in 2.6.38 nor 2.6.39-
> rc1. I am now running 2.6.39-rc1 to see if the bug will eventualy trigger or 
> not.
> 
> The WARNING with call trace on the fedora kernel that I reported in my 
> previous message (see below) also happened in the vanilla kernel in exactly 
> the same way. After that initial WARNING, I had four more WARNINGS and one BUG 
> in rapid succession, and one final BUG 14 seconds later.
> 
> I'd like to know what I can do to help nail this annoying bug. I am not sure 
> if I can git bisect it; it is hard to tell offhand if a kernel is good; it may 
> resume correctly many times before crashing.

Did you try the recent 3.1-rc?  There have been a few commits relevant
with battery module and PM after 3.0, and I guess this will be the fix
for your case, too.


Takashi
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