Operation not permitted

[gary094]

Hello there,

Installing went fine, issue is that I can't issue these commands:
sudo intel-undervolt read or sudo intel-undervolt apply

They both give me this as response:

CPU (0): Operation not permitted
GPU (1): Operation not permitted
CPU Cache (2): Operation not permitted
System Agent (3): Operation not permitted
Analog I/O (4): Operation not permitted

Altough sudo intel-undervolt measure is just fine.
Secureboot is disabled.
CPU: i7-4710HQ

[precla]

Hi, what distro and kernel version are you using?

Is Intel secure boot disabled - if enabled, disable it.
Check if msr-tools is installed (not sure if you need this, but I'm atm not at my notebook to check if I have installed it).
Run lsmod | grep msr to see if it's enabled.
To enable or temporarily run modprobe msr.

[gary094]

I am running Linux Mint 19.1 Kernel 4.15.0-45-generic x86_64

lsmod | grep msr
msr 16384 0

modprobe msr
does not give me any output.

Just checked again, Secureboot is disabled. I have a slight suspicion that this issue might be somewhat related.

Throttlestop was working perfectly fine on Windows 10 if that helps.

Thanks for your help!

[precla]

Hm, I get the same output for lsmod | grep msr...
I'm not that good for that low level stuff so i can't help you more.
Only thing that i can suggest is to recompile the msr module as the it was mentioned in that issue:
https://github.com/intel/intel-cmt-cat/wiki/UEFI-Secure-Boot-Compatibility

[kitsunyan]

measure doesn't use MSR to measure power consumption, CPU speed, and sensors, so it isn't surprising it works. It should work even without root privileges.

However, I have no idea why it doesn't work for you even when secure boot is disabled. The issue you linked is about enabled secure boot, which is not your case.

It's interesting that it worked on Windows. Just out of curiosity, can you run wrmsr 0x150 0x80000011ffe00000?

[makarov-roman]

disabling secure boot works for me
check if secure boot is enabled by

mokutil --sb-state

[gary094]

Okay I triple checked and SecureBoot still is disabled BUT I had to delete some SecureBoot Variables in BIOS and now mokutil says:

SecureBoot disabled Platform is in Setup Mode

Should be fine now I guess.