I'm running Ubuntu 15.04 and I haven't tried any of those things. My suspend/resume experience isn't like that blog, though - what happens to me is that I shut the lid, the os "suspends", I open the lid again and get an unresponsive black screen and I have to reboot.

This is almost exactly what I've done to set up my machine: http://ubuntuforums.org/showthread.php?t=2301071&p=13382949#... . This thread claimed that the kernel v4.3 fixed this issue, but it still happens for me - I was going to wait until the next 4.4 RC to give it another whirl.