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Message-ID: <20120103221954.GA2313@srcf.ucam.org>
Date: Tue, 3 Jan 2012 22:19:54 +0000
From: Matthew Garrett <mjg59@...f.ucam.org>
To: Keith Packard <keithp@...thp.com>
Cc: linux-kernel@...r.kernel.org, Bdale Garbee <bdale@....com>
Subject: Re: [PATCH] acpi/video: Don't restore backlight to 0 at boot time
ACPI arguably does define 0 as being off (this is exceedingly poorly
defined), but I'm not entirely happy with this - the firmware makes its
behaviour conditional on the OS version. I'd really like to see an
updated version of the Intel opregion spec to get a better idea of what
we're meant to be doing here, but the last one made public was ancient.
--
Matthew Garrett | mjg59@...f.ucam.org
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