http://bugzilla.kernel.org/show_bug.cgi?id=12476
Summary: Laptop fan always on, regardless of CPU temperature
Product: ACPI
Version: 2.5
KernelVersion: 2.6.27.7-134.fc10.i686
Platform: All
OS/Version: Linux
Tree: Fedora
Status: NEW
Severity: normal
Priority: P1
Component: Power-Fan
AssignedTo: [email protected]
ReportedBy: [email protected]
Latest working kernel version:
not really sure
Earliest failing kernel version:
N/A
Distribution:
Fedora 10
Hardware Environment:
Samsung X22
Intel(R) Core(TM)2 Duo CPU T7500 @ 2.20GHz
Software Environment:
kernel: 2.6.27.7-134.fc10.i686
acpid: acpid-1.0.6-9.fc10.i386
/proc/acpi/info: Version 20080609
Problem Description:
The laptop fan runs constantly even if the CPU temperature is low (36°). The
fan seems to be controlled by the BIOS which runs it at a constant RPM all the
time and not by the kernel. With Windows the fan is controlled depending on the
use and temperature.
There is 1 entry in /proc/acpi/fan/ - FAN0 and its state is "off". However the
laptop's fan is actually running.
Steps to reproduce:
1. Boot Fedora 10
I think that this was working with fedora 8 and 2.6.26 kernels, but I am not
100% sure. I will be glad to provide any additional information that might be
needed.
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