I hadn't noticed this issue ever before, but I just installed two clean Ubuntu 14.04s and on the first computer I wondered why nothing happened and on the second it didn't work either, so I googled it and found this.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/769644 Title: Alt-F2 (or "lxpanelctl run") doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/lxde/+bug/769644/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs