I have finally narrowed down what triggers the bug:
Because of buggy toshiba bios, independent of acpid version, if a suspend keeps 
a long time(seems to be in the order of hours) when the pc wakes up, the fan 
works for a while at full speed even if the cpu is cold. It then keeps the fan 
working at the slowest speed until a reset occurs.
I will add a log when the fan kept working after suspend.

If the bug belongs to another program, please tell me where to submit it.
I would also be very glad to log the actions of toshiba utilities when such a 
suspend occurs, but I don't know how.

** Attachment added: "dmesg.txt"
   http://launchpadlibrarian.net/36112998/dmesg.txt

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after resume fan runs continuously on toshiba satellite
https://bugs.launchpad.net/bugs/484750
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