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georgewhewell / undervolt

Undervolt Intel CPUs under Linux
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PermissionError: [Errno 13] Permission denied: '/dev/cpu/0/msr' #161

Closed kachapman closed 3 years ago

kachapman commented 3 years ago

When trying to use the program, I get this output:

USER:~$ undervolt -r Traceback (most recent call last): File "/home/kenchapman/.local/bin/undervolt", line 8, in sys.exit(main()) File "/home/kenchapman/.local/lib/python3.9/site-packages/undervolt.py", line 439, in main temp = read_temperature(msr) File "/home/kenchapman/.local/lib/python3.9/site-packages/undervolt.py", line 191, in read_temperature return (read_msr(msr.addr_temp) & (127 << 24)) >> 24 File "/home/kenchapman/.local/lib/python3.9/site-packages/undervolt.py", line 88, in read_msr f = os.open(n, os.O_RDONLY) PermissionError: [Errno 13] Permission denied: '/dev/cpu/0/msr'

georgewhewell commented 3 years ago

use sudo

kachapman commented 3 years ago

I forgot to mention that Sudo doesn't fix the issue.

-------- Original Message -------- On Sep 18, 2021, 1:47 AM, georgewhewell wrote:

use sudo

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kachapman commented 3 years ago 
ken-sb2:~$ undervolt -r
You need to have root privileges to run this script with these options.
Rerun with 'sudo'.
ken-sb2:~$ sudo undervolt -r
sudo: undervolt: command not found
kachapman commented 3 years ago

Looks like the issue was secure boot all along. Is there no way to enable this with secure boot enabled?