D945GCLF Bios Bug

Symptoms

you can see where I implemented the fix. The CPU spikes disappeared.

Feb 14 03:10:22 cydonia kernel: [1329285.570802] ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.LPC_.SMBR] (Node ffff88007f012900), AE_AML_INFINITE_LOOP
Feb 14 03:10:22 cydonia kernel: [1329285.570865] ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.LPC_.INIT] (Node ffff88007f0128e0), AE_AML_INFINITE_LOOP
Feb 14 03:10:22 cydonia kernel: [1329285.570917] ACPI Error (psparse-0537): Method parse/execution failed [\_GPE._L00] (Node ffff88007f0075a0), AE_AML_INFINITE_LOOP
Feb 14 03:10:22 cydonia kernel: [1329285.570975] ACPI Exception: AE_AML_INFINITE_LOOP, while evaluating GPE method [_L00] (20090903/evgpe-568)
Feb 14 03:10:26 cydonia kernel: [1329289.757035] ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.LPC_.SMBR] (Node ffff88007f012900), AE_AML_INFINITE_LOOP
Feb 14 03:10:26 cydonia kernel: [1329289.757104] ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.LPC_.INIT] (Node ffff88007f0128e0), AE_AML_INFINITE_LOOP
Feb 14 03:10:26 cydonia kernel: [1329289.757160] ACPI Error (psparse-0537): Method parse/execution failed [\_GPE._L00] (Node ffff88007f0075a0), AE_AML_INFINITE_LOOP
Feb 14 03:10:26 cydonia kernel: [1329289.757223] ACPI Exception: AE_AML_INFINITE_LOOP, while evaluating GPE method [_L00] (20090903/evgpe-568)

ACPI is turned on in the kernel.

kacpid is top of the list in top ( by cpu )

Solution

Stop doing that. In the kernel command line:

acpi=off

shame.

Notes

There have been several bios updated for this mother board. I had the latest version installed 0229.

(more here: http://downloadcenter.intel.com/Product_Filter.aspx?ProductID=2916&lang=eng )