Random freezes with AMD Ryzen fix for Manjaro

I was having these random freezes, when only hard reboot could revive the system, in Kubuntu and tried googling a lot reading system logs, updated BIOS... Decided to switch to Manjaro hoping that they will go away by itself, but I started haing freezes again especially when I lock screen...

I found these instructions and applied them: https://archived.forum.manjaro.org/t/amd-ryzen-problems-and-fixes/55533

The instructions are very easy to follow, except I could not find the BIOS option mentioned there...

So far, the system is stable and did not freeze yet. There was a minor hiccup on return from locked state, but this time tty2 (ctrl+alt+f2) worked and I ran reboot from there..

I will keep an eye on it though and will update the post.

Updates

• Had a freeze today (same day after I posted this) but not in the lock screen, when working with chrome. (05/11/2021)
• 07/11/2021: Another freeze, I was watching a youtube video.
• 24/11/2021: I finally found C-states and the idle option in BIOS, and after this I have not had any freezes yet...