Pentium-M - not recognized?

Nate Lawson nate at
Sun Mar 20 22:50:54 PST 2005

Eric Anderson wrote:
> Eric Anderson wrote:
>> Eric Anderson wrote:
>>> I have a Dell Latitude D610 laptop, and my kernel says:
>>> CPU claims to support Enhanced Speedstep, but is not recognized.
>>> Please update driver or contact the maintainer.
>>> cpu_vendor = GenuineIntel msr = 6120e2606000e26, bus_clk = 64
>>> What does that mean to me?  How can I fix it?
>>> All my various info (full dmesg, acpi dumps, etc) are available here:
> Looks like I'm in over my head.  I think a section for the 750 needs to 
> be added, but I'm not sure what to add exactly, and I'm now afraid I'll 
> light my computer on fire if I try.  The Intel doc with the specs is here:

Ok, I've committed a patch to est.c that should add support of acpi 
detection of EST parameters.  Please give it a try.  It probably won't 
work on all systems since it appears some systems need _PDC support 
(something I'm working on).  Actually, if yours doesn't work with est, 
it should work with acpi_perf.


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