I have been trying to find a way to display (AMD) GPU load in my conky, and while researching methods to display load, I found a command that - while requiring sudo - worked to print the GPU load to the terminal (sudo cat /sys/kernel/debug/dri/64/amdgpu_pm_info). Conky cannot run sudo commands, so I attempted to both:

  1. use visudo to allow myself access to the /sys/kernel/debug/dri/64 folder without having to enter the sudo password, and
  2. use chown to modify the permissions of the file to a+rwx.

Neither of these methods seemed to work to allow me to use the command without entering the sudo password, however.

All help is appreciated!

  • Just a question, why do you use sudo in the first place ? What does stat /sys/kernel/debug/dri/64/amdgpu_pm_info tells you ? – Sergiy Kolodyazhnyy Mar 15 '17 at 5:13
  • @Serg stat: cannot stat '/sys/kernel/debug/dri/64/amdgpu_pm_info': Permission denied – CodeRead Mar 15 '17 at 5:15
  • Also, how exactly did you modify sudeors? – muru Mar 15 '17 at 5:18
  • @muru, I added the line %username% ALL=(ALL) NOPASSWD: /sys/kernel/debug/dri/64 (and a variant in which amdgpu_pm_info was appended to the end of that line) with no change -- still prompted for a password. – CodeRead Mar 15 '17 at 5:27
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    Your sudoers line is incorrect in couple of aspects. One, the format is username ALL=(ALL) NOPASSWD: command. It's supposed to be for allowing executing a file. In your case, your goal is not executing a program file, but rather to read it. I think we can make a simple workaround for your case, but I'll have to post it tomorrow. Late night here – Sergiy Kolodyazhnyy Mar 15 '17 at 6:06

I'm trying to do the same, accessing this file from a shell script. Nothing works, even setting u+s permissions to the shell script. Only running the script itself with sudo works.


I found this to work:

sudo chmod a+rx /sys/kernel/debug

You must do it exactly like this (incomplete path). Works for me.

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