https://www.thinkwiki.org/w/api.php?action=feedcontributions&feedformat=atom&user=Vadim+RadionovThinkWiki - User contributions [en]2026-05-13T09:54:37ZUser contributionsMediaWiki 1.31.12https://www.thinkwiki.org/w/index.php?title=Talk:How_to_control_fan_speed&diff=42173Talk:How to control fan speed2009-03-17T16:40:10Z<p>Vadim Radionov: /* X61s */ new section</p>
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<div>Z61m is the same like Z60.<br />
<br />
The kernel 2.6.18 ibm_acpi 1.12a does not allow speed command. but with direct ecdump it works.<br />
the displayed fan speed changes.<br />
(But i dont notice any noise difference)<br />
<br />
On Z61m and Kenrel and unpatched ibm_acpi from 2.6.18:<br />
on Start the Fan is disabled :( speed 0.<br />
with echo enable > fan the fan goes to maximum rpm of 2400.<br />
(Temperatur goes above 78°C .. Bad)<br />
<br />
On Full CPU Duty:<br />
Mode RPM<br />
0 0 (fast switch)<br />
1 2257 (slow switch, 5-10s)<br />
2 2257<br />
3 2664 (fast switch)<br />
4 2699-2719<br />
5 2800<br />
6 3400<br />
7 3284 (100%load cpu temp 68°C)<br />
8-F same as 7<br />
0x8F 2600 !!<br />
0xFF speed is not chaning anymore ? (not measurement ?)<br />
0xCF 4200 (very slow chaning.. 30s for spin up)<br />
<br />
(perhaps this table helps a little bit.)<br />
<br />
== disengaged mode reset automatically ==<br />
<br />
For some reason, whenever I issue command echo level disengaged > /proc/acpi/ibm/fan, the mode is reset to auto ("by hardware") in few seconds.<br />
<br />
Thinkpad T60<br />
Ubuntu Gutsy<br />
<br />
root@Thinkbaby-Ubuntu:~# uname -a<br />
Linux Thinkbaby-Ubuntu 2.6.22-14-generic #1 SMP Tue Feb 12 07:42:25 UTC 2008 i686 GNU/Linux<br />
<br />
I have also added "options thinkpad_acpi fan_control=1" to /etc/modprobe.d/options.<br />
<br />
Any idea?<br />
<br />
---<br />
<br />
Yes. Take such questions off thinkwiki and into a proper ML, like linux-thinkpad, and I will try to answer them.<br />
<br />
--[[User:Hmh|hmh]] 03:52, 13 June 2008 (CEST)<br />
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== X61s ==<br />
<br />
On my X61s with Ubuntu 7.10 i've got speed about 5950 in disengaged mode</div>Vadim Radionov