On Thursday 30 June 2016 01:13:48 Gener Badenas wrote: > On Sat, Jun 18, 2016 at 4:41 PM, Francesco Montanari > <franz1010...@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 <s...@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