[Bug 59321] S4 broken with Haswell

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=59321

--- Comment #41 from Jens <jens-bugzilla.kernel.org at spamfreemail.de> ---
I pulled the current "drm-intel-nightly" tree
(http://cgit.freedesktop.org/drm-intel/log/?h=drm-intel-nightly, commit
09fcefee...) and tried again.

Setup:
* Ubuntu 14.04 LTS, Kernel 3.16.0+ (3.17rc1 as of now)
* MSI-7817 chipset with i5-i4570
* Boot Lubuntu desktop
* start "make -j4" in the above git checkout
* start Firefox with Youtube video
* hibernate and resume in a loop (I tried 4 reboots with 3..5 resume cycles
each)

Results:
* No more WARNING: messages upon resume
* Multiple resumes work fine
* About one in every fifth resume the machine grinds to a halt with dozens of
OOM killer messages in the logs

So: A big improvement to before (I can hibernate and resume multiple times in a
row, even with a loaded machine!). But we're not quite there yet - where do the
OOM errors come from? When I hibernate, only ~1,5G out of 8G RAM were actually
used.

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