Hi Alex,

I can add a lot of more complex code to hunt down and evaluate the _CST
objects to figure out if any C states are defined on a system. However,
the  modern kernel idle handler for Intel CPUs tries to identify the CPU
and decide the given C states so effectively ignores information anyway.
I'm quite tempted to drop this warning as it's alarming and not giving
an real information that's useful to us.  I suppose if we want deeper C
state checking, we should move that into the cstate test rather than
overload the FADT checking.

Colin

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https://bugs.launchpad.net/bugs/833644

Title:
  C state capability support check fails

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