Re: ThinkPad fan
On Thursday 30 June 2016 01:13:48 Gener Badenas wrote:
> On Sat, Jun 18, 2016 at 4:41 PM, Francesco Montanari
> <franz1010101@gmail.com
>
> > wrote:
> >
> > Hi,
> >
> > Thanks for the suggestions. I tried the following, which didn't change
> > much the situation. Can it be that the CPUs just warm up more when
> > getting old, or it shouldn't matter if cleaned properly?
> >
> > a) I disassembled and cleaned the fan. Fairly dusty (it's about 5 years I
> > have the laptop), I used a vacuum cleaner to remove the dust. I have the
> > impression that the fan now pushes out more air.
> >
> > b) I installed and configured thinkfan (despite the buggy installation
> > [1]). The package description [2] says it is helpful in the case the fan
> > is running too much (not really my problem), but it actually provides an
> > easy way in general to set the fan levels for given temperature ranges
> > [3]. In comparison to before, the fan runs faster now when above 60C.
> >
> > c) I also tried to turn on by hand the disentangled mode (~5500rpm
> > instead of ~4500rpm) [4].
> >
> > d) I had a look to the script suggested by Tom (thanks), but didn't try
> > it since I managed to install thinkfan. FYI, I think that
> > /proc/acpi/ibm/thermal is no longer the way to get the temperature.
> >
> > For "normal" use (browsing, video, music, ...) the temperature stays
> > below 60C using thinkfan. When I run with CPUs at 100% it reaches 90C in
> > less than two minutes. For work I need to launch short (few minutes) but
> > CPU expensive runs (mostly numerical integrations) on a daily basis. I'll
> > ask around if someone can lend me one of those fan pads to try it out.
> >
> > Thanks,
> > Francesco
>
> Is it just hardware issue or do you think the OS play some role on heating
> issue? Can using a different OS make temp better?
> One more suggestion is to polish the surface well before attaching the
> heatsink.
>
> > 1. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=767127
> > 2. https://packages.debian.org/jessie/thinkfan
> > 3. http://forums.debian.net/viewtopic.php?t=118734
> > 4. http://www.thinkwiki.org/wiki/How_to_control_fan_speed
> >
> > On Fri, Jun 17, 2016 at 7:27 PM, Sven Arvidsson <sa@whiz.se> wrote:
> >> On Fri, 2016-06-17 at 12:58 +0300, Francesco Montanari wrote:
> >> > Hi,
> >> >
> >> > I recently installed Jessie on a Lenovo ThinkPad T420. The fan usage
> >> > looks
> >> > reasonable. However, high temperatures (96 C) are reached when CPUs
> >> > are
> >> > running intensively for more than one minute or so. The fan speed at
> >> > those
> >> > temperatures is about 4500 rpm.
> >> >
> >> > Do you think it is ok, or do you suggest to force lower temperatures,
> >> > e.g.,
> >> > with thinkfan [1]?
> >>
> >> It isn't unusual with a temperature like that during load, but it
> >> mostly seems to happen when playing demanding games on a laptop.
> >>
> >> I wouldn't worry about it if it just happens momentarily, but long
> >> running tasks that stress the system like that is probably not suitable
> >> on a laptop.
> >>
> >> Anyway, as others have pointed out, check for dust and make sure that
> >> you don't impede air flow yourself (by placing it on bed for example).
> >>
> >> --
> >> Cheers,
> >> Sven Arvidsson
> >> http://www.whiz.se
A friend of mine recently solved a similar problem by updating the BIOS. But
that was on an Acer or Asus.
Lisi
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