Difference between revisions of "Mute button"

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(←Created page with 'Starting from Linux version 2.6.23, kernel passes OSI string "<tt>!Linux</tt>" to ACPI (instead of "<tt>Linux</tt>"). There is a number of reasons for that (see details in...')
 
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==Needed for models==
 
==Needed for models==
 
{{T400}}, {{X200}}, {{X301}}
 
{{T400}}, {{X200}}, {{X301}}
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==Microphone Mute Button==
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The Microphone Mute Button on the T410 and T410s does not work on Ubuntu 10.10 and Ubuntu 11.04.
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https://bugs.launchpad.net/ubuntu/+source/acpi-support/+bug/728310

Revision as of 11:07, 23 May 2011

Starting from Linux version 2.6.23, kernel passes OSI string "!Linux" to ACPI (instead of "Linux"). There is a number of reasons for that (see details in drivers/acpi/osl.c in the kernel source). But IBM/Lenovo has a consistently good record of supporting Linux, so this trick is not necessary for Thinkpads. Moreover, OSI string "Linux" is needed to make the Mute button work. For Thinkpads R61, T61 and X61, there are already hooks for that in drivers/acpi/blacklist.c. For most other models, you need to pass the string acpi_osi="Linux" to the kernel as a boot parameter.

Needed for models

T400, X200, X301

Microphone Mute Button

The Microphone Mute Button on the T410 and T410s does not work on Ubuntu 10.10 and Ubuntu 11.04.

https://bugs.launchpad.net/ubuntu/+source/acpi-support/+bug/728310