I've done some more research, and it appears that the fan control is
only happening at boot, in *both* the installed system and the
livecd. So if the machine is hot at boot, the fan runs and stays
running regardless of temperature changes. If the machine is cool at
boot, the fan doesn't run, regardless of temperature changes.
I've discovered interesting behavior with the sensors command and
acpi -t.
Sensors currently shows:
acpitz-virtual-0
Adapter: Virtual device
temp1: +40.0°C (crit = +100.0°C) <----- This never
changes after boot
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +56.0°C (high = +100.0°C, crit = +100.0°C)
Core 1: +57.0°C (high = +100.0°C, crit = +100.0°C)
However acpi -t shows:
Thermal 0: ok, 40.0 degrees C
The temp1 line reported by sensors never changes after boot, and
neither does the output from acpi -t. So it looks like acpi is
looking at the wrong temperature, as it's only the Core 0 and Core 1
temperatures that change.
On 2015-05-02 10:02, Glen Reesor wrote:
Some more information...
I have confirmed that the fan runs when the Jessie livecd is
running, but the fan doesn't run for amd64 or i386 installations.
I've compared syslog, daemon.log, and lsmod and found:
syslog: Both livecd and amd64 installation have these lines:
kernel: [ 0.020564] CPU0: Thermal monitoring enabled (TM1)
kernel: [ 0.943898] thermal LNXTHERM:00: registered as
thermal_zone0
kernel: [ 0.943904] ACPI: Thermal Zone [TZ01] (50 C)
syslog: There is a slight difference in the following line:
livecd: kernel: [ 3.144083] acpi device:3a: registered as
cooling_device0
amd64: kernel: [ 8.712124] acpi device:3a: registered as
cooling_device2
lsmod has slight differences:
livecd: thermal 17343 0
thermal_sys 27122 3
video,thermal,processor
amd64: thermal 17559 0
thermal_sys 27642 3
video,thermal,processor
In daemon.log, the amd64 installation has the following lines (but
they may be the result of installing the sensors package,
which the livecd does not have):
May 2 08:36:48 amd64 sensors[492]: acpitz-virtual-0
May 2 08:36:48 amd64 sensors[492]: Adapter: Virtual device
May 2 08:36:48 amd64 sensors[492]: temp1: +0.0°C
(crit = +100.0°C)
May 2 08:36:48 amd64 sensors[492]: coretemp-isa-0000
May 2 08:36:48 amd64 sensors[492]: Adapter: ISA adapter
May 2 08:36:48 amd64 sensors[492]: Core 0: +25.0°C
(high = +100.0°C, crit = +100.0°C)
May 2 08:36:48 amd64 sensors[492]: Core 1: +26.0°C
(high = +100.0°C, crit = +100.0°C)
Any help would be greatly appreciated.
Glen
On 2015-04-30 20:40, Glen Reesor
wrote:
I have done a fresh install of Jessie on an old Acer
laptop and the fan never runs, so it overheats.
Interestingly, the fan *does* run while Jessie is being
installed.
Has anyone had similar problems? Does anyone have
suggestions on how to diagnose this?
Thanks.
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