Check out Bug #42490 and https://help.ubuntu.com/community/NvidiaLaptopBinaryDriverSuspend... it looks like the POST_VIDEO option also messes up the NVidia binary driver.
-- Resume from suspend fails with FGLRX https://launchpad.net/bugs/84991 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
