[ltp] Re: [T410s] Fan running constantly

[Claudius Hubig]

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Daniel N=C3=A4slund <dannas@dannas.name> wrote:
>Hi,
>
>I have a Lenovo Thinkpad T410s. When the temperature, as reported by
>/proc/acpi/ibm/thermal, reaches a little over 40 degrees, the fan
>starts running and never stops. The temperature typically stays around
>40-45 degrees even when the laptop is idle.

Hello,

I am using a T410s with Debian Wheezy/Sid on self-compiled kernel
2.6.38 and a nice little daemon called =E2=80=98thinkfan=E2=80=99.

It basically sets the appropriate level in /proc/acpi/ibm/fan.

0 16:05 0 ares:~ # cat /proc/acpi/ibm/fan=20
status:         enabled
speed:          1993
level:          1
commands:       level <level> (<level> is 0-7, auto, disengaged, full-speed)
commands:       enable, disable
commands:       watchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))
0 17:05 0 ares:~ # cat /etc/thinkfan.conf
[=E2=80=A6]
#  Syntax:
#  (LEVEL, LOW, HIGH)
#  LEVEL is the fan level to use (0-7 with thinkpad_acpi)
#  LOW is the temperature at which to step down to the previous level
#  HIGH is the temperature at which to step up to the next level
#  All numbers are integers.
#
sensor /sys/class/thermal/thermal_zone0/temp

(0,     0,      55)
(1,     48,     68)
(2,     66,     72)
(3,     70,     73)
(5,     71,     74)
(6,     72,     75)
(7,     73,     32000)
0 17:08 0 ares:~ # cat /proc/cmdline=20
BOOT_IMAGE=3D/vmlinuz-2.6.38.a2017.6 root=3D/=E2=80=A6 ro resume=3D/=E2=80=
=A6 thinkpad-acpi.fan_control=3D1 thinkpad-acpi.brightness_enable=3D1 thinp=
ad-acpi.brightness_mode=3D0 apparmor=3D1 security=3Dapparmor quiet

So far, everything seems to be fine and has been fine for the last
few months. Temperature is usually between 35-45=C2=B0C when idling and
between 50=C2=B0C and 60=C2=B0C when doing some serious work. While compili=
ng a
kernel (or simply running burnP5 four times), it may reach up to
80=C2=B0C, albeit without any obvious problems such as instability.

I=E2=80=99ll happily provide you with further information such as my kernel
configuration (nothing special) or my cpufreqd configuration.

Best regards,

Claudius

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