Ubuntu – Have to press Fn+Alt+Volume up/down keyboard shortcut after upgrade to 14.04


My Fn+Volume up/Volume down key on a MacBook Pro late 2011 used to be functional as usual in Ubuntu 13.10. After upgrading to Ubuntu 14.04, I have to press the Fn+Alt+Volume up/Volume down keyboard combination to do the same. The weird thing is when I set this function in System Settings -> Keyboard -> Shortcuts -> Sound and media, I only push Fn+Volume up/Volume down. It sets the key binding correctly without Alt while not working with the Alt.

Best Answer

The problem is that an incorrect string is set in dconf key:

Original (working) value:

~$ gsettings get org.gnome.settings-daemon.plugins.media-keys volume-up

After running "unity-control-center keyboard", and setting the shortcut for volume-up key:

~$ gsettings get org.gnome.settings-daemon.plugins.media-keys volume-up

The new value misses the "XF86" part of the string, and does not work.

You can get the key working again by resetting the value, with:

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

The bug already reported: https://bugs.launchpad.net/ubuntu/+source/unity-control-center/+bug/1302885