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Re: NetBSD 4.0, PCIe Intel Pro/1000 PT support and Core 2 Duo speedstep support (Mark Cullen) writes:

>My first question is regarding speedstep support. I thought this was now 
>supported, but it doesn't appear to be working for me. I have "options 
>ENHANCED_SPEEDSTEP" in the kernel.

>cpu0: Intel(R) Pentium(R) Dual  CPU  E2180  @ 2.00GHz, 2000.13 MHz
>cpu0: features2: e39d<SSE3,MONITOR,DS-CPL,EST,TM2,xTPR>

Your CPU knows about Enhanced SpeedStep but it doesn't tell what
settings are usuable. The est driver supports 3 'types' of CPUs,
old ones where Intel specified all valid operating points,
newer ones where Intel doesn't give operating points but the
chip still tells you the minimum and maximum values, and
finally very new ones where the chip gives the same value
for minimum and maximum.

You seem to have one of the latter. AFAIK the only method to
control EST there is to use ACPI, and we still lack a suitable

                                Michael van Elst
                                "A potential Snark may lurk in every tree."

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