Messages in this thread | | | Date | Tue, 30 May 2006 21:51:47 -0600 | From | Robert Hancock <> | Subject | Re: cpufreq and kernel >2.6.15.6 is limited |
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Dave Jones wrote: > On Tue, May 30, 2006 at 05:25:26PM -0700, Eric Sandall wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA1 > > > > It seems that any kernel on my Dell Inspiron 5100 after 2.6.15.6 > > (including 2.6.17-rc5) 'breaks' my cpufreq in that up to and including > > 2.6.15.6 I can scale between 300MHz-2.4GHz, but after (starting with > > 2.6.16) I can only scale between 2.1GHz and 2.4GHz. > > > > I've attached the files, sorted by kernel, I assume may be helpful. Let > > me know if you need any more. > > It may have worked in the past, but the CPU has an errata which makes > it an unsafe operation to scale below 2GHz.
There was some discussion about whether this was correct or not in this thread:
http://groups.google.ca/group/fa.linux.kernel/browse_thread/thread/d5b5905d7f1aa221/66c41ee3a26583b3
Did this ever get resolved? From my reading of the N60 erratum, disabling the 12.5% duty cycle sounds like this should be enough, disabling everything under 2GHz is not necessary..
-- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from hancockr@nospamshaw.ca Home Page: http://www.roberthancock.com/
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