hi alan, jeremy On Fri, Aug 20, 2004 at 02:25:36PM +0100, Alan Cox wrote: > > i've found a pentium-m banias which reports "Mobile Genuine Intel(R) > > processor 1400MHz" in /proc/cpuinfo. this (strange?) signature > > prevents speedstep-centrino.c from working properly. > > Signatures appear to be BIOS set so that would make sense. that fact wasn't obvious to me -- i've updated the BIOS and the strange banias signature is now gone. it reports the expected "Intel(R) Pentium(R) M processor 1400MHz" string now. in excess the "ACPI-behaviour" changes from "totally broken" to "not working" which is kind of a progress... 8-} On Fri, Aug 20, 2004 at 07:19:31PM -0700, Jeremy Fitzhardinge wrote: > Yeah, there seem to be a few of these around. I'm just not certain that > they're identical to "normal" Banias as far as operating points go. it seems that the reported value depends on the mental health of the BIOS-programmer at hand, therefore the suplied string might not be trustworthy. if i understand correctly, the type of the cpu can be determined by looking at the family, model and stepping -- assuming that these values are reported directly by the CPUID (0FA2) instruction. the BIOS supplied model_name string in speedstep-centrino.c is parsed to get the clock cycle time of the cpu. is this actually supposed to be the "right" way (or worse: the only way) to get this information? thias -- Matthias Brill