[Bug 14198] ACPI (kacpid) 100% CPU usage

[bugzilla-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=14198


ykzhao <yakui.z...@intel.com> changed:

           What    |Removed                     |Added
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                 CC|                            |acpi-bugzi...@lists.sourcef
                   |                            |orge.net
         AssignedTo|acpi_acpica-c...@kernel-bug |yakui.z...@intel.com
                   |s.osdl.org                  |




--- Comment #6 from ykzhao <yakui.z...@intel.com>  2009-09-24 03:36:28 ---
Hi, Henric
    From the acpidump & lspci it seems that maybe this issue is related with
the broken BIOS.
    From the lock info it seems that this issue is related with the following
AML code in the SMBR method.
    While (LNot (And (HSTS, 0x1E, Local0)))
                    {
                        Store (0xEE, IO80)
                    }
    And it seems that HSTS is the status register of SMBUS controller.
    From the DSDT it seems that the I/O base address for SMBus controller is
0x2000. But we can know that the 0x2000 I/O base address is used by the
ethernet device.

So IMO this is a BIOS bug.

Thanks.

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