Messages in this thread | | | From | Bill Davidsen <> | Subject | Re: speedstep-centrino on dothan | Date | Wed, 06 Jul 2005 15:58:53 -0400 |
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st3@riseup.net wrote: > Currently, the speedstep-centrino support has built-in frequency/voltage > pairs only for Banias CPUs. For Dothan CPUs, these tables are read from > BIOS ACPI. > > But ACPI encoding may not be available or not reliable, so why shouldn't we > provide built-in tables for Dothan CPUs, too? Intel has released this > datasheet: > > http://www.intel.com/design/mobile/datashts/302189.htm > > with frequency/voltage pairs for every version of Dothan CPUs. > > Moreover, I checked on Pentium M 725 and Pentium M 715 that the lowest > frequency at which the CPU can be set safely is not the 600MHz given in > datasheets, but 400MHz instead, with VID#A, VID#B, VID#C and VID#D (see > datasheet for more details) set to 0.908V. > > I can provide a patch, let me know.
Slower is better, and not depending on ACPI for anything which can be gotten elsewhere is a good thing. Sounds like a good idea to me.
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