metacity window manager, fullscreen display should work with the standard shortcut defined as you describe in your question, but if you have anything other than "None" selected under System -> Preferences -> Appearance -> Visual Effects, you'll get the
compiz window manager. I couldn't find a way to make the full screen shortcut work there either.
You could use the
wmctrl utility to send a manual request for full screen mode.
wmctrl -r gvim add,fullscreen
And to revert:
wmctrl -r gvim remove,fullscreen
This works from within Vim as well, so you can map e.g. F11 to toggle full screen mode:
map <silent> <F11>
\ :call system("wmctrl -ir " . v:windowid . " -b toggle,fullscreen")<CR>
To get the complete fullscreen effect, you can hide tool and menu bar:
set guioptions-=T guioptions-=m
I personally wouldn't miss them but if you do prefer to have them in non-fullscreen, you'd probably best handle the toggling inside a function. (Check the edit history for an example.)
Finally a default setting you may have tweaked as you speak of a bottom pane is
'laststatus'. Reset it to not show the status line when there is only one window:
Or preferably find where it's set to non-default in your
.vimrc and remove it there.