[Techteam] XO-1.5 Kernel Update (i.e My Weekly Status)

Benjamin M. Schwartz bmschwar at fas.harvard.edu
Mon Jul 20 16:48:03 EDT 2009

Paul Fox wrote:
> benjamin m. schwartz wrote:
>  > cpuidle is already used by the kernel to select the ACPI state, but it is
>  > possible to add more states as well.  Therefore, it seems to me that the
>  > logical thing to do is to add the "frozen" state to cpuidle's menu.
> perhaps this should be obvious, but can it handle S-states as
> well?  because i believe that's the goal -- freeze the display
> and then go into S3.

My impression is that this has never been done, presumably due to the
absence of a DCON on other ACPI machines.    I know nothing about kernel
internals or suspend-resume, so I cannot comment intelligently on the
difficulty of supporting S3+DCON in cpuidle.


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