Alright, I just received a cinnamon update (presumably to Cinnamon 2.0) and for some reason that update changed my lockscreen, even though I'm using Unity. I wasn't using cinnamon anyway and wanted my Unity lockscreen back (the one that simply presents darkened wallpaper with a clock), so I uninstalled as much of Cinnamon as I dared using Software Centre, then used Synaptic to get rid of the bits of cinnamon (cinnamon-desktop-data ect) left behind.
The trouble is that now, when I press Ctrl+Alt+L, nothing happens, as if the cinnamon lockscreen had overwritten the default unity locker, only to have both removed. How can I get my original lockscreen back?
Cheers in advance!