[PATCH 0/5] [Karmic] Fix Mute button functionality on Lenovo Thinkpads

[Jerone Young]

Yes. Henrique is actually on the kernel bug I linked from LP bug:
http://bugzilla.kernel.org/show_bug.cgi?id=13934


On Sun, 2009-08-30 at 18:13 -0600, Tim Gardner wrote:
> Jerone Young wrote:
> > Impact: All recently Lenovo Thinkpads since the T61/X61/R61 have an
> > issue under Linux where the Mute key will act independent of the OS at a
> > hardware level. The problem though is the user never sees an OSD and
> > they also don't realize they are muted as their is no indicator. Also on
> > some Lenovo Thinkpads the mute will only work for the speakers and not
> > the headphones. 
> > 
> > LP# 281732
> > 
> > Lenovo put logic in the bios of all Thinkpads to query, if the OS is
> > "Linux", the bios will change the functionality of the mute key to be a
> > mute key press.
> > 
> > It is rather unfortunate Lenovo still doing this today. Though these
> > platforms are highly unlikely to get a bios update to better handle how
> > the mute hot key should work under Linux. Fortunately the mute key is
> > the only area that is affected.
> > 
> > Fix: The following patches are fixes by exposing the OS as Linux to
> > recently released Thinkpads so that the mute key will act as a mute key
> > press.
> > 
> > Testcase: When press mute key you will see on screen display indicating
> > that the mute key has been pressed and the sound is muted. 
> > 
> > 
> 
> Have you corresponded with the Thinkpad ACPI folks about these changes?






> 
>  From the MAINTAINERS file:
> 
> THINKPAD ACPI EXTRAS DRIVER
> M:      Henrique de Moraes Holschuh <ibm-acpi at hmh.eng.br>
> L:      ibm-acpi-devel at lists.sourceforge.net
> W:      http://ibm-acpi.sourceforge.net
> W:      http://thinkwiki.org/wiki/Ibm-acpi
> T:      git git://repo.or.cz/linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git
> S:      Maintained
> F:      drivers/platform/x86/thinkpad_acpi.c
>