Acer Aspire One running Ubuntu 9.10, fan does not start after using
suspend, machine crashes; fan then does not start at boot-up, making
machine unbootable! (crashes through heat exhaustion before boot-up
completes).

I never use Hibernate as it takes so long to resume that the benefit
isn't worth the wait. But on two occasions recently I was left with an
un-bootable machine because the fan didn't start on boot-up and the
machine crashed before completing the boot. The solution is to get the
machine very, very cold so that it can complete a boot fanless! The fan
will start once the boot is completed. The common factor on each
occasion was that I had earlier used Suspend, which I very rarely use,
and the machine crashed on or shortly after coming out of suspend, so I
am guessing that the crash was caused by some fault in fan-resume after
suspension, and the same fault also prevented the fan from resuming on a
subsequent attempt at reboot, making reboot impossible without the
intervention of a refrigerator...

Michael Hampson.

-- 
After hibernation cpu fan stops working
https://bugs.launchpad.net/bugs/113081
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