SliTaz Forum

PC become warm and fan runs terribly

(10 posts) (5 voices)

• Started 8 years ago by oui
• Latest reply from sixofeight
• This topic is not a support question

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1. 

   oui
   

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   I did become this year the old laptop from son (DELL XPS 8x i7-2670QM @ 2.2, 8 GB / 750 GB 1920x1080). It is better as my old PC (DELL Optiplex SX280 Pentium 1 GB / 500 GB alt. Laptop ACER emachines E620 AMD64 2 GB / 160 GB) and can remplace both (the emachines has a limited resolution! the Optiplex has a limited power...)

   but my problem in SliTaz: the fan runs immediately intensively, the air become very warm, so I am afraid that SliTaz can be dangerous for it?

   I am using SliTaz with 64 kernel.

   in Ubuntu (64 bit 16.04), the XPS can run hours / all the day without any heat developement and you hear the fan extremly rarely. Idem with the most Linux versions I am trying sometimes.

   what is to check, what is to do?

   Posted 8 years ago #
2. 

   az_ua
   

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   Moderator

   tazpkg get-install linux64-cpufreq

   Posted 8 years ago #
3. 

   oui
   

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   Thank you!

   a/ why not immediately in the Iso?

   b/ I did restart. No differenz... man linux64-cpufreq > No manual entry for linux64-cpufreq

   Is somewhat to do?

   Posted 8 years ago #
4. 

   sixofeight
   

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   Try this:
   modprobe cpufreq_ondemand

   if no issues:

   for config_file in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do echo ondemand >$config_file
   done

   check if the cpu slows down:
   grep '^cpu MHz' /proc/cpuinfo

   Posted 8 years ago #
5. 

   oui
   

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   Hi sixofeight

   Thank you very much.

   Result (not really comprehensive for me):

   @slitaz:~$ modprobe cpufreq_ondemand
   @slitaz:~$ for config_file in /sys/devices/system/cpu/cpu*/cpufreq/scaling_gove
   rnor; do echo ondemand >$config_file
   > done
   /bin/sh: can't create /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor: nonexistent directory
   @slitaz:~$ grep '^cpu MHz' /proc/cpuinfo
   cpu MHz : 2194.970
   cpu MHz : 2194.970
   cpu MHz : 2194.970
   cpu MHz : 2194.970
   cpu MHz : 2194.970
   cpu MHz : 2194.970
   cpu MHz : 2194.970
   cpu MHz : 2194.970
   @slitaz:~$

   Posted 8 years ago #
6. 

   az_ua
   

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   Moderator

   Show output of:

   lsmod

   lspci

   for i in $(ls /lib/modules/3.2.71-slitaz64/kernel/drivers/cpufreq/);do modprobe -av ${i/.ko.xz/};done

   then you can try again
   grep '^cpu MHz' /proc/cpuinfo

   Posted 8 years ago #
7. 

   sixofeight
   

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   Member

   Hi oui
   Yep, you need to load the right "power-options" module for your CPU.
   Mine is a AMD, so it looks like this
   before:
   root@slitaz:/home/tux# grep -i mhz /proc/cpuinfo
   cpu MHz : 2599.989
   cpu MHz : 2599.989

   root@slitaz:/home/tux# modprobe powernow-k8
   root@slitaz:/home/tux# modprobe cpufreq_ondemand
   root@slitaz:/home/tux# for config_file in /sys/devices/system/cpu/cpu*/cpufreq/s
   caling_governor; do
   > echo ondemand >$config_file
   > done

   after:
   root@slitaz:/home/tux# grep -i mhz /proc/cpuinfo
   cpu MHz : 1000.000
   cpu MHz : 1000.000
   root@slitaz:/home/tux#

   btw
   cpufreq_ondemand = the cpu-Mhz will raise if needed and go down if idle.

   oh,I forgot to say that I use the 32 bit version, hopefully it's the same for 64 bit.
   (sorry for my bad english)

   Posted 8 years ago #
8. 

   kultex
   

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   Key Master

   its a little bit old

   http://doc.slitaz.org/en:guides:cpu-frequency

   why not to the iso - it was discussed - because it produces to much errors in log - I still vote to put it immediatly to the iso

   Posted 8 years ago #
9. 

   Arnab
   

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   Member

   Does underclocking the CPU reduced overheating ?

   Long time ago I faced a similar issue with 3.2 series kernel on Debian Wheezy 7.0, updating the kernel solved it. Are you using a Linux 3.2.X series kernel ?

   Though this may be a little odd, does the Dell XPS laptop contains a discrete NVIDIA or Radeon GPU ? I'hv seen that laptop overheating problem is due to the the discrete GPU in 99% cases.

   Posted 8 years ago #
10. 

    sixofeight
    

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    Member

    ^
    --> Does underclocking the CPU reduced overheating ? <--

    My cpu (2600 Mhz) is (now) using the lowest speed step (1000 Mhz), 90% of Time, during normal work.
    The cpu power consumption goes down from 89W to ~22W,
    and even with activated "cool n quiet" the cpu temperature is at 25 deg C.
    So yes it does.

    Kernel = 3.2.71

    btw.
    cpu scaling is something different than simple underclocking
    The available speed steps,(2600,2400,2200,1800,1000 Mhz,in my case)
    are automatically dialed = on demand

    Posted 8 years ago #

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