ok to disengage fan control on W520 temporarily?

Linux on ThinkPads
Post Reply
Message
Author
ianb527
Posts: 5
Joined: Thu Jul 21, 2016 4:31 pm
Location: mission viejo, calif.

ok to disengage fan control on W520 temporarily?

#1 Post by ianb527 » Sun Aug 14, 2016 1:45 am

There are a few things that I use my W520 for that make the CPU kindof warm - eg, kernel builds, bitbake, etc...
The fan control seems to stop well short of the fan speed when the control is disengaged and I have noticed that by disengaging the fan control temporarily while doing these things that cause all cores to go to 100%, it lowers the temperatures significantly (for the most part, they stay below 80C). I couldn't care less about the noise.
My question is this: what is the risk of harming the fan motor if the speed control is disengaged temporarily (usually less than 1/2 hour)?
Also, what is the best way to control the fan and what usable speed range should I be able to get under control (right now, disengaged is usually a little less than 5000 rpm, highest under control is around 3800, which puzzles me a bit).

brchan
ThinkPadder
ThinkPadder
Posts: 1340
Joined: Sun Jun 01, 2014 11:43 am
Location: West Lafayette, Indiana

Re: ok to disengage fan control on W520 temporarily?

#2 Post by brchan » Sun Aug 14, 2016 9:15 am

There is TPFanControl for Windows and a program for linux that you can use to control the fan speeds:
http://www.thinkwiki.org/wiki/How_to_control_fan_speed
Current Thinkpads: W530 (functional classic keyboard mod), X301, T61, T60, T43, A31p, T23, 600X, 770
Other: mk5 Toughbook cf-19, mk1 Toughbook cf-53

jaspen-meyer
Senior Member
Senior Member
Posts: 718
Joined: Wed May 19, 2010 11:21 pm
Location: Pardubice, Czech Republic
Contact:

Re: ok to disengage fan control on W520 temporarily?

#3 Post by jaspen-meyer » Mon Aug 15, 2016 5:56 pm

ianb527 wrote: My question is this: what is the risk of harming the fan motor if the speed control is disengaged temporarily (usually less than 1/2 hour)?
It is a brushless motor.

Here are some fan 'live expectancy' numbers:
http://www.sepa-europe.com/en/technisch ... tancy-mtbf
T420 i7 3612QM; T420 i7 3630QM; T400 Q9100; x60s libreboot, led; x24 xiphmont led

tarvoke
Junior Member
Junior Member
Posts: 273
Joined: Sun Mar 25, 2007 12:45 pm
Location: Slightly Outside America

Re: ok to disengage fan control on W520 temporarily?

#4 Post by tarvoke » Mon Aug 22, 2016 12:42 pm

hell with tpfancontrol, what you want for any sandy/ivy -bridge is P-state + thermald.
conferre:
http://forum.thinkpads.com/viewtopic.php?t=117552

in theory, mint / ubuntu / debian are now supposed to prefer pstate over acpi, but in my experience it doesn't happen - so, explicitly pass 'intel_pstate=enable' to grub.

the default / automagic config for thermald has been fine by me, but if you don't want the fan to come on, you may need to mess with the settings.
go away.

Post Reply
  • Similar Topics
    Replies
    Views
    Last post

Return to “Linux Questions”

Who is online

Users browsing this forum: No registered users and 3 guests