I'm not sure what is causing your problem, probably it's the 'samsung-backlight' kernel module which is intended to works with intel video cards only.
Initially both the 'easy-slow-down-manager' and 'samsung-backlight' kernel modules were provided by the same package from the repository, I've now split them in 2 separate packages.
If I'm right, your problem should be fixed now by installing only the 'easy-slow-down-manager' package.
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