[Bug 577702] Re: ACPI errors at boot (HP 8540w Elite Workstation)

[FiX]

The root cause is a broken ACPI BIOS. I fixed both remaining problems by
settings "FAN always on while one AC power" in the BIOS (which is the
default value).

NOTE: This is the exact inverse settings compared to the value required
to make the "HP 8530w EliteBook Mobile Workstation" work flawlessly.

This behavior is observed using the following BIOS:


BIOS Information
        Vendor: Hewlett-Packard
        Version: 68CVD Ver. F.07
        Release Date: 03/26/2010
[...]

        BIOS Revision: 15.7
        Firmware Revision: 32.41

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ACPI errors at boot (HP 8540w Elite Workstation)
https://bugs.launchpad.net/bugs/577702
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