Comment 8 for bug 1509326

Issues are persistent in Wily BTW. Can't say if they are exactly the same since the behaviour is so unstable.
Some of the old behaviour seems gone, but I'm getting new weirdnesses, such as lightdm spontaneously restarting after unsuspending.

That particular incident:
Unsuspend started the machine, final X log message after loading was
[ 32016.399] (**) Option "xkb_layout" "de"
I switched to console 1, started investigating pstree|less. After a while, the graphic screen came up with the login screen (which I had configured to never show up, but ah well).
X log has this to say:
[ 32024.769] (II) evdev: Dell WMI hotkeys: Close
Not sure whether that means "lid closed" or the power button, but I was typing on the USB keyboard, which has neither.

Not sure what to do next, any advice welcome.