I upgraded to 14.04 just today and since I'm now using kernel v3.13 and according to This link, I should now be having power management enabled by default
How can I confirm that ?
My machine: Dell Inspiron SE 7520
My GPU (Discrete\Independent graphics card): AMD Radeon HD 7730m
My APU (Graphics card integrated into the processor): Intel® Ivybridge Mobile
If using the open source drivers, the fact that power management (dpm) is enabled should be reflected by the existence of a file named
/sys/class/drm/card1/device/power_dpm_state
(or the same with card0 or other number, whichever is your AMD card). I have more links and insights in my answer about AMD hybrid system overheating.
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