Comment 39 for bug 22336

I run ubuntu and debian on the same laptop. ubuntu crashes if I use the CPU for more than a few minutes at a time, debian doesn't. I can tell when ubuntu is about to power down because the fan in the laptop starts running at full speed continuously, making quite a loud noise, whereas in debian the fan alternates between full speed and something slower. It's as if debian is noticing that the fan isn't able to cool the CPU enough and does something to make the CPU generate less heat, whereas ubuntu doesn't.

What are the significant differences between ubuntu and debian with regards to the CPU speed management? Hopefully I can find a way of either reproducing the problem in debian, or making it disappear in ubuntu - but what should I tinker with?