I just upgraded yesterday to 15.04 from 14.10 using
sudo do-release-upgrade -d. My computer suspends and resumes with no trouble, however every time I resume, after about 30 seconds the computer goes back into suspend. If I resume, the same pattern continues.
Suspending from virtual console (ctrl+alt+F2) using
sudo pm-suspend does not cause the same problem, and I can safely switch to ctrl+alt+F2, suspend, then switch back to ctrl+alt+F7 without running into the auto-suspend problem.
However, if I suspend from the graphical screen (ctrl+alt+F7), and then switch to the virtual console, it will still automatically suspend. This happens even if within the virtual console I force a suspend before the computer automatically does it and resume, and stay within the virtual console. Every time the computer will automatically suspend again within about 30 seconds.
This makes my computer effectively unusable until I restart, after which it works fine (until I suspend from the graphical interface again, at which point I must restart).
Any ideas on what might be wrong? I have a 2013 Razer Blade 14, which has always worked with previous version of Ubuntu. Thanks!