I am affected too on Lubuntu 14.04 and I can confirm that the temporary fix proposed by Bruce is working for me as well.
If you delete .config/openbox or .config/lxpanel, the problem still is persistent because the skeleton version of lubuntu-rc.xml that is copied over (from etc) seems to be outdated / not supporting the current LXDE version. -- 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