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kevinlekiller / amdctl

Set P-State voltages and clock speeds on recent AMD CPUs on Linux.
GNU General Public License v3.0
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Problem setting voltage "Could not write new value to CPU!" #32

Closed moa5505 closed 2 years ago

moa5505 commented 2 years ago

Hello, I might be missing something here (I am far from being an expert), but I tried to undervolt my processor and could not make it. I am using a laptop with a 4700U (family 17h) with Linux Mint, I tried to execute the command sudo ./amdctl -p0 -v104 and I got the following response:

mint@mint:~/amdctl$ sudo ./amdctl -p 0 -v 104 Voltage ID encodings: SVI (serial) Detected CPU model 60h, from family 17h with 8 CPU cores. PREVIEW MODE OFF - P-STATES WILL BE CHANGED!

Core 0 | P-State Limits (non-turbo): Highest: 0 ; Lowest 2 | Current P-State: 0 Pstate Status CpuFid CpuDid CpuVid CpuMult CpuFreq CpuVolt IddVal IddDiv CpuCurr CpuPower ERROR: Could not write new value to CPU!

Does anyone know what I am missing ? Thank you !

kevinlekiller commented 2 years ago

Perhaps you have writing to MSR disabled? If so, see https://github.com/kevinlekiller/amdctl#requirements

moa5505 commented 2 years ago

I thought this was only a problem with kernels > 5.9 I am using Linux 5.4.0-91-generic x86_64

I tried sudo modprobe msr and got no message error

kevinlekiller commented 2 years ago

Alright, not sure then.

moa5505 commented 2 years ago

I think I found the problem. I disabled Secureboot in the BIOS/UEFI and now it works with no problem ! I hope this will help somebody in the future :D You can close this. Thanks for your help and reactivity !

kevinlekiller commented 2 years ago

Great, glad you got it sorted!