Comment # 9 on bug 1206683 from Dave Plater

My pc with a generation 4 i5-4590 cpu doesn't freeze but my laptop with a
generation 6 i3-6006U freezes. If I go to runlevel 1 and work my way up to
level 5 in steps the laptop boots into kde but if I close the lid and sleep it
freezes. This is a total lockout and only a long press on the power switch to
switch it off succeeds. I attached the log from the laptop and a picture of the
freeze up point. 
The only other difference between machines is the laptop has 4 gig of ram and
the pc has eight.