Public bug reported:
Cooling fan does not turn on when it should while in screen save (or powersave
screen off) causing an overheat and safety shutdown of laptop at 95 degrees C.
Acer Aspire 5100 laptop running 64-bit Ubuntu 8.04.3 LTS. 1 MG RAM 2
Mhz dual core AMD processor (Turion 64-bit), acpi 0.09-3ubuntu1, acpid
1.0.4-5ubuntu9.3, acpi-support 0.109-0hardy2.
This is a new issue. This machine has been running 64-bit Ubuntu 8.04
since April 2008 and this problem only recently began to occur. I would
expect the fan to be turned on when necessary even when in screen saver
or monitor powersave off mode to keep the cpu within acceptable
operating parameters. This being a new issue is why I am not
attributing this to a hardware issue and am wondering if a recent update
caused a regression.
My temporary workaround is I installed a cpu temperature monitoring
applet which resides on my upper panel and not only displays the current
temperature but also sounds a repeating alarm whenever the cpu temp
exceed 72 C.
I can reproduce this by leaving the machine alone and allowing it to go
into screensaver and after some time the alarms will sound. Once I
wiggle the mouse the fan will then turn on and bring the temperature
back to acceptable levels.
While using the computer normally, I notice that it usually operates in
the mid 50's C and the fan will turn on when it reaches 63 C and bring
it back to the mid fifties.
I have not yet attempted a BIOS upgrade to see if that would help (I
feel like since this is a new problem that I should not have to resort
to that.)
Thanks for taking a look at this and attempting to resolve it.
** Affects: acpid (Ubuntu)
Importance: Undecided
Status: New
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cooling fan not turning on while in screen saver Aspire 5100
https://bugs.launchpad.net/bugs/428721
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