Microphone mute not supported

[Daniël van Eeden]

Binary package hint: gnome-control-center

For audio output muting there is /apps/gnome_settings_daemon/keybindings/volume_mute, but there is no input (microphone) mute shortcut gnome-keybinding-properties.

On a Lenovo Thinkpad T410s this is the ACPI event for the microphone mute button.
$ acpi_listen
ibm/hotkey HKEY 00000080 0000101b

This is on Ubuntu 10.10 (Maverick)

1. Please allow a shortcut for microphone mute
2. Bind the ACPI event to that shortcut

There is a XF86AudioMute defined in /usr/share/X11/XKeysymDB, but not something like XF86InputMute

[Daniël van Eeden (dveeden)]

The following appears in the dmesg output if I press the microphone mute key once.
[ 5677.782467] keyboard: can't emulate rawmode for keycode 240
[ 5677.782485] keyboard: can't emulate rawmode for keycode 240

[Daniël van Eeden (dveeden)]

I've used this as work-around
Added a new keyboard shortcut which executes this:
/usr/bin/pacmd "set-source-mute alsa_input.pci-0000_00_1b.0.analog-stereo 1"

This is binded to 0xf8 (which is the mute key).

The only issue is that this doesn't toggle mute, so it only mutes and never unmutes.

[Daniël van Eeden (dveeden)]

To execute a script when the button is pressed:
$ cat /etc/acpi/events/lenovo-mutemic
event=ibm/hotkey HKEY 00000080 0000101b
action=/etc/acpi/lenovo-mutemic.sh

/usr/share/acpi-support/key-constants is based on /usr/include/linux/input.h

There is a KEY_MUTE defined, but no KEY_MICMUTE...
/usr/include/linux/input.h
#define KEY_MUTE 113

[Daniël van Eeden (dveeden)]

Three is no microphone mute key defined in /usr/include/linux/input.h

[Timothy Gott (gott-spam)]

I'm using Ubuntu 10.04 ... I created both a launcher and a keyboard shortcut for myself. Works for me, thanks.

Mute Mic = "/usr/bin/pacmd "set-source-mute alsa_input.pci-0000_00_1b.0.analog-stereo 1"
UnMute Mic = "/usr/bin/pacmd "set-source-mute alsa_input.pci-0000_00_1b.0.analog-stereo 0"

[Timothy Gott (gott-spam)]

Duh ... I just found a better way to do this. ONE launcher and ONE shortcut can be used if I use this.

amixer set Capture toggle