Thanks for sharing. I have an RX 6800 and Ubuntu 23.04

• To be honest the only thing I'm missing from the Control Panel (a thing that I always enable in all games) is "RIS" (Radeon Image Sharpening).
• Control+Shift+O: I replaced it by running "Mangohud"
• Radeon Chill (to cap FPS a bit below my max refresh rate, example 141 fps limit): I replaced it with "Mangohud"
• FreeSync: Well I just have to enable it and run Gnome in Xorg on the logon screen... (instead of Ubuntu wayland).
• Overclock: I'm not doing in Linux because I don't run super heavy AAA like Warzone 2.0. But I have tried CoreCtrl and seems to work. (After enabling OC flag for amd).
• Quick monitoring outside games: "Mission Center" I just installed and it's very similar to W11 task manager in terms of monitoring.
• ROCM: it was a pain in the ass to install. I installed some package that enables opencl / rocm while leaving the linux AMDGPU driver. But then it was still not working, and spend days until I finally discovered that I had to add my user to some groups "render" and "video", something like that. Now I've been using it with CUDA apps like SDXL (in python) and it's working like a charm.

That being said. My main os is W11. If I'm playing a game where my PC is overkill, I stay on Ubuntu (example Monster Hunter Rise or Elden Ring). If I'm playing a game where I need more fps, I go to windows 11 because there is still some % drop by using Proton/Wine etc. Sometimes 20% sometimes 10%. depends. Basically, If the game gives me < 100 FPS in Windows. I stay on Windows.