ACPI on an Acer TravelMate C100

ACPI on an Acer TravelMate C100

[The Purple Flamingo]

Hello.   I am fairly confident that ACPI is supported by my laptop,
because I have read several references to it working on it, and the
BIOS-provided physical RAM map mentions ACPI as well.

However, at boot, I get:
  ACPI: RSDP (v000 Acer                                  ) @ 0x000ec2d0
    >>> ERROR: Invalid checksum

and later on,

  ACPI: Subsystem revision 20050211
  ACPI: Interpreter disabled.

and APM loads instead.  If I compile a kernel sans APM, then I get no PM.
Trying pnpacpi=off, pci=routeirq, apm=off, and acpi=force have done nothing.  
There is not even a /proc/acpi !

This is problematic because my laptop thinks there are no batteries
now, and suspending freezes the machine on lid close (though running a
script for it succeeds . . . unless I try to close the lid!)

I am using Ubuntu Linux 5.04.
Vanilla kernels have no better luck then theres.

What can I do? 

Richard Schwarting


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