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Date: Wed, 2 Nov 2011 14:49:00 +0100
From: Andi Kleen <andi@firstfloor.org>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: mingo@elte.hu, torvalds@linux-foundation.org, linux-kernel@vger.kernel.org,
        rjw@sisk.pl
Subject: REGRESSION: "perf: Add PM notifiers ..." breaks resume
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Resume stopped working on my Acer Aspire 1830T post 3.1. The screen
just stays black after wakeup.

I bisected it down to 

commit 144060fee07e9c22e179d00819c83c86fbcbf82c
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date:   Mon Aug 1 12:49:14 2011 +0200

    perf: Add PM notifiers to fix CPU hotplug races
    
Reverting this patch fixes the problem for me.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only.