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In Unity I use my ThinkPad hot keys to change the volume. I need to know the command that these keys run so that I can bind it in my window manager.

I have tried using amixer but could not change the volume through command line

amixer set Master 10%- amixer: Unable to find simple control 'Master',0

amixer scontrols: Simple mixer control 'IEC958',0

amixer set 'IEC958' 50%- amixer: Invalid command!

So obviously this is not what Unity is running. I have tried changing the default sound card as well but that didn't help.

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so basically they're not simple keybinding->command process, MediaKeys give you scancode which is interpreted by X. Some reading for you https://help.ubuntu.com/community/MultimediaKeys

  • I guess this must be right because nothing I've tried affects the volume. – user2787904 Oct 21 '13 at 10:44
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The following command:

pactl set-sink-volume 0 50%

will set the volume at 50%. To increase the volume with 10% you can use:

pactl set-sink-volume 0 -- +10%

To decrease the volume with 10% you can use:

pactl set-sink-volume 0 -- -10%

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