From: Lukas Hejtmanek <xhejtman@ics.muni.cz>
To: Calvin Walton <calvin.walton@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [Regression] 2.6.37-rc1: Lenovo T61 mute button does not work
Date: Wed, 1 Dec 2010 09:08:50 +0100 [thread overview]
Message-ID: <20101201080850.GK10354@ics.muni.cz> (raw)
In-Reply-To: <1291172324.14274.33.camel@nayuki>
On Tue, Nov 30, 2010 at 09:58:44PM -0500, Calvin Walton wrote:
> The mute button on this series of Thinkpads is a little weird (I have an
> R61i, which is the same iirc) - the behaviour of the button depends on
> the ACPI firmware. With no operating system running, it behaves as a
> persistent hardware mute. Windows apparently uses a proprietary driver
> to control the volume - part of this functionality has been added to the
> Linux thinkpad_acpi driver, but it's not fully enabled yet.
Behaviour in 2.6.36 kernel is OK as expected. Something broken it in
2.6.37-rc1.
> 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.
[ 0.000000] ACPI: DMI detected: Lenovo ThinkPad T61
[ 0.000000] ACPI: Added _OSI(Linux)
looks good.
--
Lukáš Hejtmánek
next prev parent reply other threads:[~2010-12-01 8:09 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 [this message]
2010-12-01 22:54 ` Lukas Hejtmanek
2010-12-03 14:13 ` Lukas Hejtmanek
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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