While you're here, please consider supporting GamingOnLinux on:
Reward Tiers:
Patreon. Plain Donations: 
PayPal.
This ensures all of our main content remains totally free for everyone! Patreon supporters can also remove all adverts and sponsors! Supporting us helps bring good, fresh content. Without your continued support, we simply could not continue!
You can find even more ways to support us on this dedicated page any time. If you already are, thank you!
Reward Tiers:
Patreon. Plain Donations: PayPal.This ensures all of our main content remains totally free for everyone! Patreon supporters can also remove all adverts and sponsors! Supporting us helps bring good, fresh content. Without your continued support, we simply could not continue!
You can find even more ways to support us on this dedicated page any time. If you already are, thank you!
Login / Register
- Nexus Mods retire their in-development cross-platform app to focus back on Vortex
- Canonical call for testing their Steam gaming Snap for Arm Linux
- Windows compatibility layer Wine 11 arrives bringing masses of improvements to Linux
- GOG plan to look a bit closer at Linux through 2026
- European Commission gathering feedback on the importance of open source
- > See more over 30 days here
How to setup OpenMW for modern Morrowind on Linux / SteamOS and Steam Deck
How to install Hollow Knight: Silksong mods on Linux, SteamOS and Steam Deck- Weekend Players' Club 2026-01-16
- grigi - Venting about open source security.
- LoudTechie - Welcome back to the GamingOnLinux Forum
- simplyseven - A New Game Screenshots Thread
- JohnLambrechts - Will you buy the new Steam Machine?
- mr-victory - See more posts
Linux Distribution: Ubuntu 20.04
Graphics Card: RX 5600 XT
GPU Driver Version: AMDGPU
I can unlock the access to adjust clocks and voltages of my AMD GPU by appending the Kernel parameter amdgpu.ppfeaturemask=0xffffffff with kernel 5.8.x of Ubuntu 20.04 but not with kernel 5.4. Why not with kernel 5.4 ? With kernel 5.8, I can edit the file /sys/class/drm/card0/device/pp_od_clk_voltage but with kernel 5.4, I can't, as the file is not unlocked, permission deny even with root. I confirm I update grub after each modify. I followed the procedure from: https://wiki.archlinux.org/index.php/AMDGPU
Some of my data:
$ cat /etc/default/grub | grep GRUB_CMDLINE_LINUX_DEFAULT=GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amdgpu.ppfeaturemask=0xffffffff"
$ ls /sys/class/drm/card0/device | grep pp_od
pp_od_clk_voltage
$ cat /sys/class/drm/card0/device/pp_od_clk_voltage
$ uname -a
Linux ASUS-xxx 5.4.0-45-generic #49-Ubuntu SMP Wed Aug 26 13:38:52 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Last edited by Vinouch on 5 Sep 2020 at 5:58 pm UTC
"I can't, as the file is not unlocked, permission deny even with root"
Elaborate on this. Does this file even exist?
Last edited by tuxintuxedo on 5 Sep 2020 at 1:36 pm UTC
That looks like the relevant set of patches (and more) going into drm-next-5.5.
I don't get the hostility by the way. We're just trying to help. None of this is controversial and all of the information is freely available.
Last edited by damarrin on 5 Sep 2020 at 6:18 pm UTC