ACPI differences 4.10 - 5.3, laptop problem

[Nate Lawson]

Wilkinson, Alex wrote:
>    0n Tue, Nov 30, 2004 at 10:05:46AM -0800, Kevin Oberman wrote: 
>    
>    > Looks like the same processor I have and you can try adding:
>    > options	   CPU_ENABLE_TCC
>    > to your kernel. This enables the P4 Thermal Control which will let you
>    > throttle the speed of the CPU without ACPI. Use the hw.p4tcc sysctls to
>    > manage the speed.
> 
> Kevin, why don't you use 'C states' for the afforementioned ?
> Throttling reduces CPU performance. I thought it would be better to
> use C1,C2,C3, states. Or does fbsd ACPI not support C states yet ?

It's supported them since 5.2 a year and a half ago, including static 
_CST support.  This is equivalent to Linux.  Also, support is automatic 
so he doesn't need to configure them.

-- 
Nate