I am admittedly a newbie user. I have recently got an Ubuntu 13.04 install working on my rMBP (as you can infer from the title) and noticed that suspend doesn't work. The system shuts down properly, but will not resume after reopening the lid and/or pressing keys. After some google searching I stumbled upon someone saying that the nvidia driver work with suspend. If there is in fact no solution for me to stick with my nouveau driver and suspend properly, then how may I go about installing the appropriate nvidia driver? Thank you very much in advance.
I too faced the same issue. Seems that the nouveau driver for nvidia is buggy. So all you have to do is switch to integrated intel card and disable the nvidia card.
Make sure xserver-xorg-video-intel package is installed
Switch to the integrated card: I couldn't do that from Linux. [Not sure if there is a simple way in Ubuntu to achieve this] I booted Mac OSX, installed gfxcardstatus app from http://graphic-card-status.mac.informer.com/2.1/ and then set it to "Integrated Only".
Reboot to ubuntu. Suspend/resume should work like a charm