Comment 25 for bug 748539

While I would still like to see this fixed, I have found a workaround (that at least works in 12.10):

- In compizconfig-settings, enable the 'Extra WM Actions' plugin

- in the options for this plugin, enable a bindkey for the 'Toggle always on top' option (I chose ctrl-F9)

Now you can open the application and its fullscreen window. With the fullscreen window focussed, press the chosen bindkey. Now you can focus another window or app on the other monitor, and the fullscreen window will stay on top on its monitor.

I've tested this for both libreoffice-impress presentation fullscreen window, and totem in fullscreen mode.

Note that other windows showing on the same monitor as the fullscreen window will NOT now show, even if you focus them (e.g. using an Alt-Tab sequence). This is to be expected, as the fullscreen window is now marked as always on top. However if you arrange for the other window to also have the always-on-top attribute, then you can then use Alt-Tab to flip between them.