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I am trying to change the power profile on my ATI Mobility Radeon HD 4530 in order to prevent overheating.

I'm following instructions which say to do the following:

sudo sh -c "echo profile > /sys/class/drm/card0/device/power_method"
sudo sh -c "echo mid > /sys/class/drm/card0/device/power_profile "

However when I try and run this I get the following error

sh: 1: cannot create /sys/class/drm/card0/device/power_method: Directory nonexistent

How can I change the power profile so my laptop doesn't overheat?

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1 Answer 1

Reset to default
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The problem was that the AMD Catalyst driver was still installed, the system wasn't using it because my card is no longer supported, however it was still installed and this was in some way preventing /sys/class/drm from being there.

I uninstalled the AMD Catalyst driver and rebooted and after that I could change the power profile.

The good news is after running that command my temp dropped 15 degrees.

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  • I had even better performance by adding radeon.dpm=1 in the boot options. askubuntu.com/a/390050/16395 ... but I do not know if it will be useful with your kernel. HTH
    – Rmano
    Mar 6, 2014 at 21:22

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