Comment 0 for bug 1328727

Hibernation with the pm-hibernate command works fine on a freshly
booted system, but when a significant portion of the RAM is in use,
for instance by starting gimp, google-chrome and firefox at the same
time, it stalls at the start of the saving of the image data:

s2disk: Snapshotting system
s2disk: System snapshot ready. Preparing to write
s2disk: Image size: 441652 kilobytes
s2disk: Free swap: 1798624 kilobytes
s2disk: Saving 110413 image data pages (press backspace to abort) ... 0%

The system is not usable at this point, although alt-sysrq still
works. It looks like some sort of deadlock.

The system is an Asus eeePC 1000HE with 2GB RAM and a 2GB swap
partition and a Samsung SSD 840 EVO. The Ubuntu release is 14.04
LTS. The kernel package is linux-image-3.13.0-27-generic version
3.13.0-27.50 (32 bit).

I found a kernel bug report that looks exactly the same:

https://bugzilla.kernel.org/show_bug.cgi?id=75101

In that bug report, the problem was bisected to commit a1c3bfb2.
This commit is part of the 3.14 kernel, but was apparently backported
to the 3.13 Ubuntu kernel. I've rebuild the kernel package with this
commit reverted, and it seems to fix this issue for me.