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spoovyOffline
Post subject: Fan control for ThinkPad T420i?  PostPosted: 08.01.2012, 20:26



Joined: 2012-01-04
Posts: 8
Location: Bristol, UK
Status: Offline
Hello all. I'm very impressed so far with aptosid's handling of my laptop hardware; but one problem remains - fan speed. Even under low load and at low temperature it is whirring like crazy. With RHEL installed the fan is barely audible at similar load levels. I am looking for a way to get it back under control.

I have tried the following from ThinkWiki.org -

"For Debian Squeeze (testing) create /etc/modprobe.d/thinkpad_acpi.conf with: options thinkpad_acpi fan_control=1 and install the package thinkfan

Having done so, reboot and you can use the following commands to control fan speed:

# echo level 0 > /proc/acpi/ibm/fan (fan off)

# echo level 2 > /proc/acpi/ibm/fan (low speed) "


But this has no apparent effect. Anyone got any other ideas?

Thanks in advance
 
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spoovyOffline
Post subject:   PostPosted: 08.01.2012, 21:29



Joined: 2012-01-04
Posts: 8
Location: Bristol, UK
Status: Offline
OK with a bit more research i've found out how to get thinkfan to work. The hack requires that I have all vital hardware temp inputs. I'm not a programmer and not good finding my way around /proc and /sys.

So far i've got -
/sys/devices/platform/coretemp.0/temp1_input
/sys/devices/platform/coretemp.0/temp2_input
/sys/devices/platform/coretemp.0/temp3_input
/sys/devices/virtual/hwmon/hwmon0/temp1_input

Anyone got any more places i should be looking? Where would I find HDD temp sensor output for example?

thanks
 
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spoovyOffline
Post subject:   PostPosted: 12.01.2012, 19:40



Joined: 2012-01-04
Posts: 8
Location: Bristol, UK
Status: Offline
It works fine with these settings; for future reference.

sensor /sys/devices/platform/coretemp.0/temp1_input
sensor /sys/devices/platform/coretemp.0/temp2_input
sensor /sys/devices/platform/coretemp.0/temp3_input
sensor /sys/devices/virtual/hwmon/hwmon0/temp1_input

(0, 0, 55)
(1, 48, 60)
(2, 50, 61)
(3, 52, 63)
(4, 56, 65)
(5, 59, 66)
(7, 63, 32767)
 
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