[gentoo-user] 'Hibernate' by power button

[Mick]

Hi All,

A few weeks ago I updated acpi and hibernate and their relevant configuration 
files.  Since then when I press the power button on my laptop nothing 
happens.

Clearly something was changed, intentionally or otherwise, and this feature is 
no longer available to me.  Would you care to point me in the right 
direction - how do I set my power button to run the hibernate script?
-- 
Regards,
Mick