From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] PM: acquire device locks prior to suspending
Date: Wed, 12 Dec 2007 23:42:01 -0800
Message-ID: <20071212234201.a8932915.akpm@linux-foundation.org>
References: <Pine.LNX.4.44L0.0709211536570.5816-100000@iolanthe.rowland.org>
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To: Alan Stern <stern@rowland.harvard.edu>
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On Fri, 21 Sep 2007 15:37:40 -0400 (EDT) Alan Stern <stern@rowland.harvard.edu> wrote:

> This patch (as994) reorganizes the way suspend and resume
> notifications are sent to drivers.  The major changes are that now the
> PM core acquires every device semaphore before calling the methods,
> and calls to device_add() during suspends will fail.

Causes my t61p to deadlock during suspend-to-RAM.  Really late - the little
moon symbol has started to flash but the LCD is still powered and the
cursor still blinks.  Only a poweroff restores control.