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#1 2013-07-13 16:56:21

lansizhong
Member
Registered: 2013-07-13
Posts: 13

[SOLVED]why my laptop is hot with light load?

Dear all,
My latop is lenovo X220 with arch linux. Sometimes it just get hot temperature (almost 100 degree) for no reason, with <1% CPU average load and 10% used memory. During that, "top" show X and firefox are top CPU consumers. After reboot, anything is OK and quiet again. Is there any way I can find the true CPU consumer? or release the CPU as with memory?

Thank you?

---------------------
Solution here:
The replies are right. It is about power regression and can be solved according to https://wiki.archlinux.org/index.php/Le … eat_issues.

Last edited by lansizhong (2013-11-06 07:53:04)


Arch Linux Lenovo X220 SSD(MSATA) + HDD SLIM XFCE4

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#2 2013-07-13 19:51:18

WonderWoofy
Member
From: Los Gatos, CA
Registered: 2012-05-19
Posts: 8,412

Re: [SOLVED]why my laptop is hot with light load?

I imagine that you are suffering from the Sandy Bridge power regression.  Do a search for that on these forums and you will find a monster thread that discusses the issue (though it has no permanent resolution).

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#3 2013-07-14 06:28:57

lansizhong
Member
Registered: 2013-07-13
Posts: 13

Re: [SOLVED]why my laptop is hot with light load?

I am feeling desperate already ....


Arch Linux Lenovo X220 SSD(MSATA) + HDD SLIM XFCE4

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#4 2013-07-14 06:31:01

jasonwryan
Forum & Wiki Admin
From: .nz
Registered: 2009-05-09
Posts: 18,536
Website

Re: [SOLVED]why my laptop is hot with light load?

Make sure all of the vents are clean; if CPU isn't spiking it sounds like the cooling system is not performing.


Arch + dwm   •   Mercurial repos  •   Github

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#5 2013-07-15 04:56:00

lansizhong
Member
Registered: 2013-07-13
Posts: 13

Re: [SOLVED]why my laptop is hot with light load?

I am sure the cooling system is working, because the fan sound is huge.
After a couple of times, I am sure that this is related to suspending.
My kernel is 3.9.9. I can't believe that it is still affected.


Arch Linux Lenovo X220 SSD(MSATA) + HDD SLIM XFCE4

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#6 2013-07-15 05:02:54

WonderWoofy
Member
From: Los Gatos, CA
Registered: 2012-05-19
Posts: 8,412

Re: [SOLVED]why my laptop is hot with light load?

Fan sound does not determine the levels of dust in your machine. 

Have you even thought to try to see if you can find more information about this?  Did you reference the thread that I mentioned in the second post?  Have you tried a different kernel?

As it is, there is no real information about what your problem could possibly be.  The only information that you have given is that your machine gets hot, and presumably suspending has something to do with it.... oh and the "fan sound is huge".

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#7 2013-07-19 13:01:09

anon1054572
Member
Registered: 2012-04-14
Posts: 17

Re: [SOLVED]why my laptop is hot with light load?

what does cat /proc/loadavg give?

Last edited by anon1054572 (2013-07-19 13:01:16)

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#8 2013-07-19 15:15:09

Hyugga
Member
From: Santiago, Chile
Registered: 2010-03-26
Posts: 329

Re: [SOLVED]why my laptop is hot with light load?

Iḿ having this problem too. Specially after resuming from suspend.
I have an Ivy Bridge CPU.

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#9 2013-07-19 16:16:33

Earnestly
Member
Registered: 2011-08-18
Posts: 804

Re: [SOLVED]why my laptop is hot with light load?

Randomly after suspending the CPU gets locked into Turbo mode (3.2 GHz), a work around for now is to suspend again and resume (doesn't matter how long you wait as long as it suspends and resumes fully).

Annoying I know, same hardware.

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