cpu0: Unable to find _CST method

[Stephane E. Potvin]

Abdullah Al-Marrie wrote:
> Hello,
> 
> I have strange msg in the dmesg
> 
> cpu0: Unable to find _CST method
> 

[dmesg removed]

Hi Abdullah,

The warning you are seeing (along with the following line: cpu0: 
Switching to generic Cx mode) is part of the recent upgrade to the acpi 
cpu driver to enable higher Cx modes for SMP systems. The warning just 
indicates that you have a multi-cpu system but that your ACPI AML didn't 
provide a _CST method. This is a harmless warning and the cpu driver 
will revert to using the previous method to change the Cx states). This 
will probably limit you to the C1 state, ymmv. You might want to try to 
update to a newer BIOS version, which might include the _CST method.

Regards,

Steph