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I've upgraded to 14.04 LTS, and now my volume up and down keys no longer work.

The mute button still works, bizarrely. The Media buttons (prev track, play/pause and next track) have also stopped working.

I have a previous generation Lenovo ThinkPad X1 Carbon i.e. the one without the 'soft function keys', so this is not a softkey issue.

Worked previously with Ubuntu 13.10. I am using an up to date install.

uname output:
Linux 3.13.0-34-generic x86_64 GNU/Linux

I've checked the system settings->keyboard->shortcuts->sound and media and they register the up and down volume keys just fine. If I change the keys to be (say) ctrl- and ctrl+, then I can alter the volume, but when I change them back to 'Audio lower volume' and 'Audio raise volume' by using the keys, they no longer change the colume or activate the top-right corner 'control flash' the same way that mute or brightness controls do.

I'm at a loss. There's obviously nothing wrong with the keys, but somewhere in the OS the keypresses are being diverted or dropped and they don't make it through to applications as events...

marked as duplicate by Fabby, Eric Carvalho, user364819, 2707974, David Foerster Oct 13 '15 at 17:28

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  • If you go into system settings -> keybaord -> Sound and Media, and click on the Audio raise key text, then press Super + =, does that shortcut work to raise it? – Tim Aug 20 '14 at 12:19