Comment 33 for bug 1446177

No, I would prefer if you stick to the 12.04 base (optionally remove the 3.19 kernel or just boot into the original 3.13) and install the special linbirt-1.2.12 from 15.04 for 14.04. I hope this works since I had to drop systemd/cgrougmanager related changes that would not compile in the old environment. So its only compile tested right now. Fingers crossed it should produce similar debug messages about parsing sysfs.