I think I found where the problem started:
I tried different Kernels on my 14.04 devel. branch.
Check with acpi_listen if signal gets catched. This is the result:
kernel version | acpi_listen can see mic mute
------------------------------------------------------
3.11.0 | yes
3.11.9 | yes
3.11.10.4 | yes
3.11.10.6 | yes
3.12.0-031200rc1 | no
3.12.0-031200rc2 | no
3.12.0-031200rc4 | no
3.12.0 | no
So I guess the problem occured first at 3.12.0 rc 1
But the thing is that even if I get the signal (till 3.11.10.6) Ubuntu
does not react to this... Is this another issue?
** Changed in: linux (Ubuntu)
Status: Incomplete => In Progress
** Changed in: linux (Ubuntu)
Status: In Progress => Confirmed
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https://bugs.launchpad.net/bugs/1268880
Title:
unable to toggle microphone mute on T410 / unable to unload
thinkpad_acpi module
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