From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Keith Packard <keithp@keithp.com>
Cc: linux-kernel@vger.kernel.org, Bdale Garbee <bdale@gag.com>
Subject: Re: [PATCH] acpi/video: Don't restore backlight to 0 at boot time
Date: Tue, 3 Jan 2012 22:19:54 +0000 [thread overview]
Message-ID: <20120103221954.GA2313@srcf.ucam.org> (raw)
In-Reply-To: <1325321547-20637-1-git-send-email-keithp@keithp.com>
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@srcf.ucam.org
next prev parent reply other threads:[~2012-01-03 22:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-31 8:52 [PATCH] acpi/video: Don't restore backlight to 0 at boot time Keith Packard
2012-01-03 22:19 ` Matthew Garrett [this message]
2012-05-24 7:13 ` Keith Packard
2012-05-24 13:24 ` Matthew Garrett
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