Setup

Launch CoreCtrl on session startup

Execute this command on a terminal:

cp /usr/share/applications/corectrl.desktop ~/.config/autostart/corectrl.desktop

Don't ask for user password

CoreCtrl uses a helper with root privileges to control your system. In order to start the helper, the system will ask you to enter your user password. If you want to avoid being asked every time for your password, you can grant root access to the helper permanently. Just create the file /etc/polkit-1/rules.d/90-corectrl.rules with the following contents:

polkit.addRule(function(action, subject) {
    if ((action.id == "org.corectrl.helper.init" ||
         action.id == "org.corectrl.helperkiller.init") &&
        subject.local == true &&
        subject.active == true &&
        subject.isInGroup("your-user-group")) {
            return polkit.Result.YES;
    }
});

Replace your-user-group with your user group name.

Full AMD GPU controls

Currently, to have full control of your AMD GPU while using the amdgpu driver, you need to append the boot parameter amdgpu.ppfeaturemask=0xffffffff to your bootloader configuration and reboot.

NOTE: The following instructions are for guidance only. Check your distribution documentation on how to add a boot parameter before proceed.

If your system uses Grub, edit the file (as root) /etc/default/grub and append the parameter to GRUB_CMDLINE_LINUX_DEFAULT:

GRUB_CMDLINE_LINUX_DEFAULT="<other_params>... amdgpu.ppfeaturemask=0xffffffff"

Then regenerate (as root) the bootloader configuration file with the command:

grub-mkconfig -o /boot/grub/grub.cfg

Reboot your system.

You should have more controls when you select Advanced as Performance mode.