LinuxQuestions.org - Why does my laptop just turns off unexpectedly

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alekosbiiofilos

10-14-2011 10:21 PM

Why does my laptop just turns off unexpectedly

Ok, i have Arch Linux, cpu-freq-utils (ondemand governor) and laptop-mode
Why when im compiling stuff or alignming a big bunch of sequences (bioinformatics), my laptop just turns off
i have a Toshiba Satellite A665, Processor Intel Core i7 at 1.6 GHz
this is not a server but i think it should be capable of decent computation withowut turning off!

thank you!!

macemoneta

10-14-2011 11:33 PM

That sounds like an overheat. Many Toshiba laptops seem to have overheating problems, and a Google search on that model and overheat got many hits. I suggest you try to see if Toshiba has a BIOS update to turn the fans on high earlier to prevent the problem.

alekosbiiofilos

10-15-2011 01:34 AM

well, that make sense, but why in other distros that doesn't happen?
should i tweak cpufreq or laptop mode in a special way??

macemoneta

10-15-2011 01:55 AM

With ondemand, you can try:

Code:

echo 99 > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold

That will keep the CPU running at a lower power level as long as possible.

You can also try switching to the conservative governor (for each CPU):

Code:

echo "conservative" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

You can also make conservative more conservative with:

Code:

echo 95 > /sys/devices/system/cpu/cpufreq/conservative/down_threshold

Try the various configurations to see which works for you.

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