Update: I found that I can reliably reproduce the failure by running
stress --vm-bytes $(awk '/MemFree/{printf "%d\n", $2 * 0.9;}' <
/proc/meminfo)k --vm-keep -m 1
and then trying to hibernate. So I did a git bisect between
Ubuntu-4.2.0-34.39 and Ubuntu-4.2.0-35.40 and identified this commit[0]
as the one that introduced the problem.
[0] http://kernel.ubuntu.com/git/ubuntu/ubuntu-
wily.git/commit/?id=292d352640b677d473fbd9e13c63a0826fafa2a8
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https://bugs.launchpad.net/bugs/1570503
Title:
Computer freezes on hibernate
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