https://bugs.freedesktop.org/show_bug.cgi?id=91278
--- Comment #19 from Andy Furniss adf.lists@gmail.com --- (In reply to Andy Furniss from comment #18)
So after last update I ran valley again briefly and saw a few vmfaults, then a longer run and got thousands again.
without touching anything else did echo mem >/sys/power/state and then woke up.
10 minute run of valley has produced zero faults.
Further test from power off, nothing else running apart from X/fluxox short run of valley no faults. Reran valley for a bit longer and got thousands. Did memsleep ran valley no faults but after about 10 minutes it hung.