Comment 48 for bug 748080

On my HP laptop I'm also using:
echo low | sudo tee /sys/class/drm/card0/device/power_profile

Luckily, it doesn't have any negative side effects for me ( I know some other have).
My fan's speeds, that gkrellm reports are:
0, 50, 70, 80 100 %

If I don't set the power_profile to low, my fan usually spins at 80%, few seconds after I set it to low, the far spins down to 70%.

Not a bad start, but I was able to make it better:
WARNING: this will require you to remove the heat sink and fan and probably will VOID your warranty!!!

I bought some "Arctic Silver 5 Thermal Compound" with the cleaning kit (~$10) and replaced the existing thermal compound. Do NOT over use it!
The heat issue kept getting better and now - after couple of month - from cold boot my laptop's fan completely turns off after the initial spin on the BIOS screen and it stays off for 8-9 minutes.

Also, during every day use the fan spins at 50% vs. 70% as it used to.