From mboxrd@z Thu Jan  1 00:00:00 1970
From: Len Brown <lenb@kernel.org>
Subject: Re: a question about lid input device
Date: Tue, 28 Sep 2010 21:12:03 -0400 (EDT)
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To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Paul Fox <pgf@foxharp.boston.ma.us>, Henrique de Moraes Holschuh <hmh@hmh.eng.br>, Zhang Rui <rui.zhang@intel.com>, "linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>

> > the lid:  is /proc/acpi/button/lid/LID/state going away?

> Yes, according to feature-removal.txt ACPI procfs interface shoudl have
> been gone back in 2008.

Note that /proc/acpi/button/lid/*/state is not reliable
on a measurable portion of systems.

We suspect that other operating systems do not use it,
and thus when Linux tries to use it, sometimes we get burnt.

thanks,
-Len Brown, Intel Open Source Technology Center