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Old 05-02-2012, 04:58 AM   #1
gabytf
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CPU heated up easily


My laptop CPU heated up easily, does the kernel i am using play a reason? i am using the normal kernel which come from distro, slackware -current. Linux 2.6.38.7

- Which CPU is in your laptop?
Intel(R) Pentium(R) M Processor 1.70 GHz

Last edited by gabytf; 05-02-2012 at 12:56 PM. Reason: Provide more info
 
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Old 05-02-2012, 06:06 AM   #2
TommyC7
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Generally, no. It could be a physical problem with your laptop on the inside. A problem with the heatsink, maybe the thermal paste has worn away, lots of possible reasons. Does your laptop automatically shutdown after some time?
 
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Old 05-02-2012, 06:19 AM   #3
red_fire
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I have always used kernel-huge that comes with slackware and never encountered such problem on my laptop,, in fact it's running pretty efficiently. . however when im running windows vista, the processor on my laptop does get heated up easily (like it speeds up or something.)
 
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Old 05-02-2012, 06:34 AM   #4
solarfields
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run powertop
may be something "wakes up" the cpu constantly
i have had a similar problem in the past
 
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Old 05-02-2012, 06:49 AM   #5
TobiSGD
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Quote:
Originally Posted by gabytf View Post
My laptop CPU heated up easily, does the kernel i am using play a reason? i am using the normal kernel which come from distro, slackware 13.37 -current.
At first, there is no such thing as Slackware 13.37 -current, you are either using 13.37 or -current.
To your problem, on my desktop system with AMD Phenom II CPU (wouldn't you think that it may help if you tell us something about your hardware?) running -current I recognized that I have load the kernel module for that CPUs power-saving (powernow-k8) manually, and that I also have to set the power-saving governor for every core manually to ondemand, seems that performance is the default.

So my questions to you are:
- Which version of Slackware are you running?
- Which CPU is in your laptop?
- Are the kernel-modules for your CPU loaded?
- Which governor is activated for your CPU-cores?
- Which temperatures do you actually get (idle/loaded)?
 
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Old 05-02-2012, 01:07 PM   #6
gabytf
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Thank you for your correction.i am on Slackware Current.


- Which CPU is in your laptop?
Intel(R) Pentium(R) M Processor 1.70 GHz

i don't know how to get the info for below:
- Are the kernel-modules for your CPU loaded?
- Which governor is activated for your CPU-cores?
- Which temperatures do you actually get (idle/loaded)?
 
Old 05-02-2012, 02:17 PM   #7
schmatzler
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Does it just heat up a bit or does it OVERHEAT? (e.g. when you touch it, you burn your fingers?).

A notebook should never get so hot that it hurts you. If it does, there is something wrong with the coolant system.

You have a Pentium M notebook, singlecore - so I assume its an older model, at least a couple of years old. I guess its time to blow some dust out of that old box and renew the thermal paste and maybe also some of the thermal pads, that are usually sitting onto the GPU and blocking most of the heat when they dry out.

Even notebooks need some care from time to time
 
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Old 05-02-2012, 02:38 PM   #8
gabytf
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Not overheat but heated up that i feel it is abnormal. It did not automatically shut down.
Yes, it is DELL Inspiron 700m, about 6 years now. i think cleaning need to be done too, but it might also some other reasons like modules or kernels.
 
Old 05-02-2012, 06:17 PM   #9
TommyC7
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Unless you've messed with the kernel since this started happening, I wouldn't put the kernel on my list of suspects. Yes there are options in the kernel to improve performance but again -- unless you messed with the kernel recently it simply isn't a logical suspect.

Also, if you haven't cleaned the dust out of your laptop for 6 years...that definitely is a culprit.
 
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Old 05-02-2012, 06:55 PM   #10
astrogeek
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I agree - if you have never cleaned the dust in 6 years than look no further for now!

I don't know about Dell, but for many laptops if you just turn it over and find the fan intake, take a deep breath and blow into it you will see a dust cloud emerge from the fan exhaust.

Usually it is the buildup of very fine dust in the heatsink ducts that does it.

Of course, the best way is to open it up and clean the entire air path - not too much problem on most models.

Other things to consider - be sure the fan is actually running. Also run top when it is hot and see if there is actually some process with high CPU usage. Those are not clear from your earlier posts.
 
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Old 05-02-2012, 07:25 PM   #11
TobiSGD
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Yes, cleaning the cooling system is definitely the first thing to do.

If that doesn't help:
Quote:
Originally Posted by gabytf View Post
i don't know how to get the info for below:
- Are the kernel-modules for your CPU loaded?
If I am not mistaken the right driver for power-saving on your CPU should be acpi-cpufreq, just do a
Code:
lsmod|grep cpufreq
and see if that is on the list.

Quote:
- Which governor is activated for your CPU-cores?
To see which governor is loaded you can use the same command as above, the governor should be cpufreq-ondemand.

Quote:
- Which temperatures do you actually get (idle/loaded)?
To check the temperatures you can use lm-sensors.
 
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Old 05-02-2012, 09:38 PM   #12
gabytf
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Alright, i will do a fan cleaning as my first step.

Here are more details:

bash-4.2# lsmod|grep cpufreq
cpufreq_ondemand 7096 1
acpi_cpufreq 3584 0
freq_table 1975 2 cpufreq_ondemand,acpi_cpufreq
mperf 923 1 acpi_cpufreq
processor 18858 2 acpi_cpufreq

bash-4.2# lm-sensors
bash: lm-sensors: command not found
 
Old 05-03-2012, 05:13 AM   #13
TobiSGD
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Well, the right modules for your CPU and the right governor are loaded, as we can see, that is good.

Regarding lm-sensors, this is only the name of the package (which might be not installed by default on your system). The command (after installation, if needed) to detect the sensors in your system is
Code:
sensors-detect
After this you can have a look at the temperatures with
Code:
sensors
 
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Old 05-03-2012, 08:14 AM   #14
tronayne
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You should have GKrellM available (it comes with Slackware). First, blow out the dust. Second, raise the back end of the box about a half-inch or so (use an eraser or something) -- make sure you've got it sitting on wood or glass, a hard surface (not on a carpet or cloth). Then start up GKrellM -- you'll get a display that shows your CPU(s), processes, disk activity, Ethernet activity, temperatures, memory use, swap and a mail indicator. Right-click at the top of the display and choose Configuration, then Builtins, then Sensors and enable Temperature, Fans and Voltages (Temperatures will most likely capable of enabling, Fans and Voltages may not -- they're not available on all boxes).

You start GKrellm with
Code:
nohup gkrellm &
in a terminal window (you can then close the terminal). You can drag the display to the upper right or lower right of your screen.

Keep an eye on the display. Your processor core(s) should be running at about 1% to 2% with nothing much going on (the machine is just mumbling to itself) with X and Firefox running. If it or they are 50% or higher, you need to find out what is doing that which is where top comes in handy.

Keep in mind that the fan should come on if the box is getting hot -- if it doesn't, you may have a dead fan. If you're up to it, you can open the case (with, of course, the battery removed) and see if the fan will spin by just blowing on it or turning it with, oh, say, a pencil, a toothpick or something. Fans have really good bearings, they'll spin freely with just a puff of air; if it doesn't, if it doesn't want to move easily, you need a new one.

The main thing with laptops is they have to breath; blow out the dust, check the mechanical health, keep an eye on the GKrellM display and chase down an abnormal indicators.

Hope this helps some.
 
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Old 06-17-2012, 09:00 PM   #15
gabytf
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Thank you guys. Did a fan clean up, fan still working fine, breathing holes stuck/blocked with a tick layer of dust.

System temperature much better now. Thank you for the info provided.
 
  


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