TODO revision 1.2 
1Important things to make ACPI useful on more machines:
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3* Add support for attaching acpiec devices early using the ECDT.  Some
4  systems need this because otherwise their _INI methods try to access
5  regions in the EC space before it's initialized.
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7* Fix the locking protocol in acpiec.
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9* Support thermal levels and fan control in acpitz.
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11* Deal with the "implicit" return problem for older laptops.
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13- mycroft, 2003/11/01
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