Just a small post to make your life going back to normal a little sooner with emacs on ubuntu 16.04 (possibly others). The M-` (grave, for searching purposes of other people I include: tilde, apostrophe, quote) was overlayed by two shortcuts. Now their removal. Information gathered from https://bugs.launchpad.net/unity/+bug/874734 and http://askubuntu.com/questions/132304/how-to-disable-alt.
First, the removal of actual shortcut.
dconf write /org/gnome/desktop/wm/keybindings/switch-group “[‘disabled’]”
Then the alt key, which starts the launcher or menu bar. Start ccsm, then navigate to Ubuntu Unity Plugin, first panel General, and disable both “Key to show the menu bar while pressed” and “Key to show the HUD when tapped”.
Hopefully your emacs is free again.
hruskam.wordpress.com 