Hello and sorry for the huge delay! This <Super_l> key is generally reserved by the WM (Compiz/Unity, Gnome- Shell, etc.). Can you check that? You can have a look to your WM config or you can also launch the dock from a terminal and check if you see warning about this shortkey.
** Changed in: cairo-dock (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1459354 Title: super_l doesnt hide app menu To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cairo-dock/+bug/1459354/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs