[arch-general] Laptop overheating causes decreased CPU performance until reboot (even after cooling)

Sean Greenslade sean at seangreenslade.com
Thu Sep 4 16:05:45 EDT 2014

> The root cause of the heating, is bad physical heatflow design in general
> (My fans are already on max usually in these cases). I've taken some
> measures for cooling though occasionally temperature levels still peak.

You may want to look into a laptop cooler.

> I can understand if the CPU scales down as an emergency measure (and is
> quite likely the case). My problem is that it doesn't scale back up when
> the temperature comes back to normal (~60 degC). Infact I've also suspended
> the laptop, left it for an hour to come down to room temperature and on
> resuming the scaled down levels persist. Although I'm not able to find a
> way to check that it is indeed scaled down, just simply the performance
> drops

Powertop may be of use, I'm not sure. Again, I suspect that it is a
hardware failsafe mechanism, so there's probably nothing you can do
about it. Your only option is to prevent the CPU from hitting 95 degC.


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