fan runs continuously on Toshiba L305-S5933

Bug #319075 reported by MDill on 2009-01-20
Affects Status Importance Assigned to Milestone
acpi-support (Ubuntu)

Bug Description

I'm afraid that I'm only assuming that this is the correct package.

acpi-support versios: 0.114-0intrepid2
Kernel: 2.6.27-9-generic #1 SMP Thu Nov 20 22:15:32 UTC 2008 x86_64
BIOS: InsydeH2O Rev. 3.5
CPU: Intel Dual Core T3400

Expected behavior: The fan should cycle on and off to maintain cpu temperature within a safe range.

Actual behavior: When first booted, the fan does not start running until the CPU temperature reaches 75C ( I've installed lm-sensors to monitor this). The fan then starts, on high I think, and remains on thereafter even though the temperature quickly stabilizes at around 25C.

I can stop the fan by performing Suspend-to-RAM, and then the cycle will repeat after resuming.

MDill (mattdill) wrote :

I still don't know whether my problem is best covered by this project, but I have found that adding acpi_osi="Linux" to the boot options in GRUB fixes it. The fan now cycles on and off to keep the temperature between 35 and 50°C.

Vladimir Hidalgo (vlad88sv) wrote :

A friend of mine had this same problem, after searching I came across those HowTo's:

So, it seems Ubuntu 9.04 does not like Toshiba L305.

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