Re: [patch] hibernation: utilize ACPI hardware signature

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On Wed, 2008-01-02 at 17:29 +0800, Johannes Berg wrote:
> > Once reading the ACPI spec I noticed that ACPI supports this feature
> > so it is qute nice to implement it, since this will prevent resume from disk what hardware was changed.
> > 
> > But.. how many bioses are broken regarding this feature....
> 
> If they are broken though, how likely is it they'll have a changing
> signature? I'd expect the most likely broken case is they just don't
> calculate it at all and leave it constant.
In my limited check, Thinkpad implements the signature fine, others
sound not. They are not broken, but just not implement the signature,
eg, it's always 0.

Thanks,
Shaohua

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