In fact I see from my bug #1384454 that Utopic with kernel 3.16.0-23 and with 3.18.0-031800rc1 both suspended ok with external screen (though they did suffer from windows moving workspaces as in that bug).
In fact I see from my bug #1384454 that Utopic with kernel 3.16.0-23 and with 3.18.0-031800rc1 both suspended ok with external screen (though they did suffer from windows moving workspaces as in that bug).