Laptop fan keeps pulsing when the machine is idle

[timrichardson]

I have a Toshiba Satellite u400 laptop with 64bit 12.10 installed. Previously it ran 12.04.
Under 12.10, the fan pulses into high speed, stays that way for less than a second pauses for about a second, and repeats.
This happens under no load.
I guess it's a kernel problem.

[timrichardson]

This seems to make it behave more like it used to prior to kernel 3.5
edit /etc/default/grub (eg with sudo vi ) and change the default kernel parameters so it reads like this (adding the acpi_osi=Linux)
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux"


and then
sudo update-grub
and a reboot.

[SteveRiley]

acpi_osi=Linux

I have a habit of always including this on every *buntu install I create. Others I use:

noop -- if your computer has only SSD drives, there's no need for a sophisticated I/O scheduler
pcie_aspm=force -- mandatory enable PCIE active state power management
raid=noautodetect -- shave a few milliseconds off boot by skipping the RAID detection step

[claydoh]

I have a habit of always including this on every *buntu install I create. Others I use:

noop -- if your computer has only SSD drives, there's no need for a sophisticated I/O scheduler

Silly question, but does this include USB connected hard drives? I am loving my new ssd, I think it perks up my laptop more than ram world have.


Sent from my SCH-I510 using Tapatalk 2

[SteveRiley]

Silly question, but does this include USB connected hard drives? I am loving my new ssd, I think it perks up my laptop more than ram world have.

If it's the only drive you're using in the system, sure -- noop is intended only for solid state devices. But if you have any spinning drives, it's better to use the default I/O scheduler. Up through Precise the default was CFQ; now with Quantal it's deadline.