I have an Alienware M17x with Kubuntu 14.10. When I suspend to RAM and close the lid, very often it will wake up after a few seconds of sleep. Sometimes not. I get the feeling it's related to how quickly the lid is closed, but I have no hard data on this.
Here is my dmesg. There was a suspend-wake incident a few minutes ago.
dmesg | grep -i lid shows nice, clean "lid opened" and "lid closed" events -- this is not a bounce issue.