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TODO revision 1.4 
      1 Important things to make ACPI useful on more machines:
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      3 * Split the Region initialization into two passes -- one that fills in
      4   AddressSpace pointers, and one that calls _REG methods.  Right now we
      5   can lose due to a _REG method for one Region calling a method that
      6   accesses another Region that hasn't been fixed up yet.  (Affects
      7   Sverre Froyen's HP Omnibook 6000.)
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      9 * Fix problems with ACPI_PCI_FIXUP.  CardBus slots do not work in some
     10   machines currently.  (Affects many machines.)
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     12 * Add support for attaching acpiec devices early using the ECDT.  Some
     13   systems need this because otherwise their _INI methods try to access
     14   regions in the EC space before it's initialized.  (Affects Steve
     15   Rumble's Thinkpad T23.)
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     17 * Deal with the "implicit return" problem for older laptops.  (Mostly
     18   affects older Toshiba laptops, like the Portege 7140.)
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     20 * Fix the locking protocol in acpiec.
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     22 * Support thermal levels and fan control in acpitz.
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     24 - mycroft, 2003/11/02
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