From: Lukas Hejtmanek <xhejtman@ics.muni.cz>
To: ming.m.lin@intel.com, robert.moore@intel.com, len.brown@intel.com
Cc: Calvin Walton <calvin.walton@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: [Regression] 2.6.37-rc1: Lenovo T61 mute button does not work
Date: Fri, 3 Dec 2010 15:13:58 +0100 [thread overview]
Message-ID: <20101203141358.GA6936@ics.muni.cz> (raw)
In-Reply-To: <1291172324.14274.33.camel@nayuki>
Hi,
On Tue, Nov 30, 2010 at 09:58:44PM -0500, Calvin Walton wrote:
> > in 2.6.36, mute button worked as expected on my ThinkPad T61 - it toggled
> > mute with mixer applet notification. In 2.6.37-rc1, it only mutes without any
> > event to any mixer applet.
[...]
> By default on this series of laptops, Linux runs with the ACPI
> _OSI(Linux) exported - when the bios of this laptop model sees that it's
> running on Linux, it disables the hardware mute functionality and the
> mute button acts as a standard keyboard key.
>
> Search your dmesg for lines containing '_OSI(Linux)' - it should say
> that a BIOS query was honoured. Make sure you do not have 'acpi_osi="!
> Linux"' on your kernel command line.
The breaking commit is this one: b0ed7a915abac309fcb5a51bccd3782e3daa7417
This changes
[ 0.200241] ACPI: BIOS _OSI(Linux) query honored via DMI
to
[ 0.200241] ACPI: BIOS _OSI(Linux) query honored via cmdline
which apparently does not work with Lenovo T61.
--
Lukáš Hejtmánek
next prev parent reply other threads:[~2010-12-03 14:14 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-30 18:53 [Regression] 2.6.37-rc1: Lenovo T61 mute button does not work Lukas Hejtmanek
2010-12-01 2:58 ` Calvin Walton
2010-12-01 8:08 ` Lukas Hejtmanek
2010-12-01 22:54 ` Lukas Hejtmanek
2010-12-03 14:13 ` Lukas Hejtmanek [this message]
2010-12-06 1:37 ` Lin Ming
2010-12-06 9:31 ` Lukas Hejtmanek
2010-12-06 9:42 ` Lin Ming
2010-12-07 3:19 ` Lin Ming
2010-12-08 12:34 ` Lukas Hejtmanek
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