Comment # 26 on bug 810133 from Takashi Iwai

(In reply to Olav Reinert from comment #25)
> > And, now try to rmmod only i915 module but keeping button module (and don't
> > forget to boot with nomodeset option), and check the lid behavior again.  Is
> > it same behavior like the previous test?  Or system reacts for the action
> > you defined?
> 
> In this case, the system reacts according to the action defined in
> logind.conf. Multiple sleep/resume cycles works reliably.

OK, then the problem is likely i915 driver.  It locks up at some point, either
suspend, resume or DPMS on/off.

But, still it's strange that systemd setup didn't change the behavior.  It
should be irrelevant with i915 module itself.

So, please double-check the following:
- Boot with nomodeset option, keep i915 module but inactive.  Does this follow
lognd.conf setup?
- Booth without nomodeset option, and check logind.conf setup again.

At next, speaking of the hang: we need to catch up the point whether the hang
happens.  If it's an i915 driver problem, it's often just a GPU hang and the
kernel itself is alive.  If so, in many cases, you can still reach to the
machine remotely via ssh, for example.  Please check it, and get the kernel
messages if possible.