https://bugs.freedesktop.org/show_bug.cgi?id=67002
--- Comment #11 from jackdachef@gmail.com --- I had to restart due to some other issue
and it wouldn't "successfully" resume anymore:
the lag/slowdown was there again
forcing performance_level to "low" or "auto" didn't seem to make a difference
so I'll try a 3.11-rc2* kernel in the weekend then - provided of course that it runs without other problems
could it be related to reboot from Windows (windows 8 -> linux) that resume worked properly ?