http://bugzilla.kernel.org/show_bug.cgi?id=13157
Summary: Fan not switching properly with Intel ICH9 and Insyde
H2O bios
Product: ACPI
Version: 2.5
Kernel Version: 2.6.28.7 (also tried 2.6.29.1)
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Fan
AssignedTo: acpi_power-...@kernel-bugs.osdl.org
ReportedBy: thoralf.dass...@gmail.com
Regression: No
I recently bought a Toshiba Satellite L300 - 1AQ, which has an ICH9 chipset.
For this laptop Toshiba have switched BIOS to Insyde H2O; I have the latest
version, which is 1.60.
It looks as though the kernel's Toshiba Laptop extras (under power management)
are not working (properly) for this chipset / BIOS combination
because of the following symptoms:
After booting Linux with a cold CPU, the fan runs at minimum speed. The fan
only spins up to maximum speed when the critical CPU temperature is reached;
there a now in-between spin states before the critical trigger kicks in. Once
the CPU is cold again (finger and listening test), the fan keeps spinning at
maximum and the only way to get it spin down again is to reboot Linux.
I had the laptop collected by Toshiba and they replaced the motherboard; same
symptoms with the original and the new board. I also tried these Linux
boot options to no effect:
acpi=rsdt
acpi.power_nocheck=1
acpi_osi=!Linux acpi_osi=!Windows 2001
acpi_osi=!Windows 2001 SP1
acpi_osi=!Windows 2001 SP2
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