est CPU support

[Andriy Gapon]

on 01/11/2010 11:52 Joerg Traeger said the following:
> Hi,
> 
> I have got several mainboards with CPUs which appear not to be
> supportet by est. An error exists: 
> 
> (examle of somewhat older Intel DG45FC with DualCore E5200 and latest BIOS)
> 
> est0: <Enhanced SpeedStep Frequency Control> on cpu0
> est: CPU supports Enhanced Speedstep, but is not recognized.
> est: cpu_vendor GenuineIntel, msr 61a4c1f06004c1f
> device_attach: est0 attach returned 6      <----------

Do you have ACPI enabled?

> p4tcc0: <CPU Frequency Thermal Control> on cpu0
> [...]
> est1: <Enhanced SpeedStep Frequency Control> on cpu1
> est: CPU supports Enhanced Speedstep, but is not recognized.
> est: cpu_vendor GenuineIntel, msr 61a4c1f06004c1f
> device_attach: est1 attach returned 6
> p4tcc1: <CPU Frequency Thermal Control> on cpu1
> 
> Searching the net I found several hints this CPU (Intel DualCore E5200) _is_ 
> supported by EST and the voltage is being reduced in idle states like 
> intended.
> So it looks like there are more things which might break success using est for 
> me. Can you explain what may be a reason for this problem? In the past it was 
> about hardcoding cpu data about voltages into the source but as I know this 
> is not the case anymore but ACPI is involved.
> Is the BIOS likely to be the reason or is it an ignored CPU stepping or...?
> 
> Same happens with the new CPU Intel Atom N550 on a Jetway board called 
> NC9c-550-LF. est does not attach and some watts are wasted.
> 
> Thank you!


-- 
Andriy Gapon