Comment 203 for bug 1690085
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e3ace39
(Get the code!)
I don't "buy" this explanation. My PSU (Coolermaster G650M) specifically states: Haswell C6/C7 support & zero load operation
@Klaus Mueller: What this option changes is that it disables XFR and turbo (single core is 3600 same as all core) and it sets P1 state to 3600, 1.35V as can be seen in zenstates.py output. This configuration makes the CPU to spend longer time in 1.35V and less time to 0.9V and less. It does seem to make the problem less frequent.
@Seth Jennings: I agree with you, I believe there is an issue with the on-chip power management. Let's hope it can be fixed in firmware.