Yes, you're right. As you said, MSR register contains the frequency and voltage information of cpu. By writing the register, we can change voltage as well (it's the information from intel datasheet). But, i cannot find the detail of this register. BTW, what's the reason that MSR register can not be changed in OS level? is it only possible to change in BIOS? Thanks. 2011/1/27 Phillip Susi <psusi@xxxxxxxxxx>: > On 1/27/2011 4:10 AM, mihn wrote: >> Hi, >> >> I want to change voltage and frequency seperately. >> With cpu-freq, i can change frequency, but cannot change voltage AFAIK. > > The voltage is controlled by the platform and should already be set to a > level appropriate for that frequency. AFAIK, recent intel cpus have > MSRs that configure the voltage for each P-state, but these are set up > by the bios and shouldn't need changed. > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
