Clear Abnormal Termination Bit

John Baldwin jhb at freebsd.org
Thu May 10 15:47:07 UTC 2007


On Thursday 15 June 2006 12:36:58 pm Anish Mistry wrote:
> I just saw an email on the Linux ACPI list someone posted they needed 
> to clear the abnormal termination bit on some motherboards before 
> suspending so that the BIOS would correctly hand-off back to the OS.
> 
> I'm not sure if we're doing this already, but the equivilent would be 
> to put the following before going into S3:
> AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1_STATUS, 
> 0x800);

I looked at this again today, and it was actually fixed in ACPICA by 
preserving the state of certain reserved bits.  7.0 has the updated ACPICA 
(20060623 or later).

-- 
John Baldwin


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