Comment 25 for bug 1302885

Coeur Noir (coeur-noir) wrote :

I just have had that bug, with volume up and down keys no longer working after changing some shortcuts through "system parameters → keyboard → shortcuts tab"

Solved by :

gsettings reset org.gnome.settings-daemon.plugins.media-keys volume-down
gsettings reset org.gnome.settings-daemon.plugins.media-keys volume-up

on Ubuntu 14.04