I have the following (default) keyboard shortcuts in xfce4: XF86Display <Super>p <Control>Escape <Control><Alt>Delete <Alt>F2
<Alt>F2 works, but <Control>Escape and <Control><Alt>Delete don't work. I don't know what keys correspond to XF86Display and <Super>p so I haven't tested those. The commands associated with the two shortcuts that don't work do execute successfully so I'm not sure what the problem is. Does anyone know how to fix this? - Grant