Quick Guide to Generate a SSDT for CPU Power Management

[nmano]

Without an option in BIOS (or patched/unlocked BIOS), ** Impossible **. Read post #134.

What can I do if I want 15 bit MSR E2?

 

[RehabMan]

What can I do if I want 15 bit MSR E2?

Read post #136. The mechanisms are clearly identified in that post.

You should ask yourself *why* you want to unlock MSR 0xE2.

 

[nmano]

Read post #136. The mechanisms are clearly identified in that post.

You should ask yourself *why* you want to unlock MSR 0xE2.

You mean I have to change bios option.
Thank you.

 

[RehabMan]

You mean I have to change bios option.

Not all BIOS implementations provide an option for it. In which case would require patched/unlocked BIOS.

But why?

 

[nmano]

Not all BIOS implementations provide an option for it. In which case would require patched/unlocked BIOS.

But why?

Pike said this
I don’t see any output of the AppleIntelInfo.kext so I presumed that something went wrong. Code blocks may help.

In short. You want to check the value of MSR_PMG_CST_CONFIG_CONTROL.(0xE2) : 0XNNNNN
Check for bit-15 (0x8000) and thus if you see it there, then MSR 0xE2 is locked. Otherwise it is not locked.

 

[RehabMan]

Pike said this
I don’t see any output of the AppleIntelInfo.kext so I presumed that something went wrong. Code blocks may help.

In short. You want to check the value of MSR_PMG_CST_CONFIG_CONTROL.(0xE2) : 0XNNNNN
Check for bit-15 (0x8000) and thus if you see it there, then MSR 0xE2 is locked. Otherwise it is not locked.

A locked MSR 0xE2 does not prevent implementation of CPU PM.
What is your issue?

Since MSR 0xE2 becomes read-only after writing a 1 to bit 15, the only way to unlock it is within BIOS.

 

[nmano]

I don't have any issue.
Work everything is good but he said some thing wrong

A locked MSR 0xE2 does not prevent implementation of CPU PM.
What is your issue?

Since MSR 0xE2 becomes read-only after writing a 1 to bit 15, the only way to unlock it is within BIOS.

I check my bios I don't see this value.
# PowerMgmtDxe | Haswell-E
F7731B4C-58A2-4DF4-8980-5645D39ECE58 10 P:0FBA6C24380F:0FBA7424380F
I am using bios version F22j
http://www.gigabyte.com/products/product-page.aspx?pid=5126#bios

 

[RehabMan]

I don't have any issue.
Work everything is good but he said some thing wrong

Don't worry. The "sky will not fall" (Chicken Little reference) due to locked CPU MSR 0xE2.

 

[nmano]

Don't worry. The "sky will not fall" (Chicken Little reference) due to locked CPU MSR 0xE2.

Thank you king.

 

[llamafilm]

This is the newly generated one, no idea if its better or not, but at least we know Broadwell-E is working

I have a Broadwell-E 6950x, and I can't get more than one p-state using Pike's script. Trying to figure out what's different that makes yours work. Are you using a Fake CPUID in clover or any other tricks?
Does Intel Power Gadget show frequency going up and down as it should? Mine shows a flatline at 4GHz all the time.