This post is more of a loose question. I can play the game just fine without RT. But still if the hardware is there and performance (As I can see in Windows) can also be good then it might be worth trying to solve this issue.

I tried AMDVLK but then the whole PC crashed when launching the game…
Fingers crossed for RADV then.

Thanks! Those are pretty ok numbers imo! For an AMD’s first gen RT card 40 FPS in 1440p is very ok. Ghostwire should be less demanding so it also should have around 40 FPS or more.

With Proton it should perform just as well

Exactly! It should, from what I heard Wine/Proton/Mesa developers strive to keep performance as close as possible to native or if possible even surpass it. So every time game doesn’t run as well on Wine like it does on Windows there is something that can be improved.
I don’t know anything about programming GPU drivers but I want to help with debugging as much as I can.

The performance difference is way to big, and a weird CPU behavior. Most games run with very minimal performance impact on Linux. Some games can even run better on Linux than on Windows and I’m not talking about native versions. Most developers don’t care about Linux at all.
Currently 100% of my gaming is done on Linux. I only switch to Windows partition to test, compare and diagnose issues with Proton/Wine.

Do you have Vulkan-radeon installed?

Yes:

$ pacman -Q | grep -i radeon                                                                                       
lib32-vulkan-radeon 1:24.3.4-1
vulkan-radeon 1:24.3.4-1

$ ls /usr/share/vulkan/icd.d/  
radeon_icd.i686.json  radeon_icd.x86_64.json

Any errors running vulkaninfo?

I’m not sure what do you mean, I can run vulkaninfo but I thought it’s only for displaying info about vulkan. Can’t see any errors there.

Your cpu is old, I wouldnt expect much more than 40 fps

True, but I’d be happy if I get even 30. Except I don’t event get 15… Besides if CPU on Windows hovers around 40% and GPU is 99% then I’d guess that CPU is not a bottleneck. That weird 100% CPU spikes must be related to either configuration or driver issue.

I do have a 6700xt and can test with cyberpunk for RT if you want

Thanks, I tried some other games like Quake RTX. Portal RTX, Shadow of the Tomb Raider, and I feel like performance there is very similar to that on the Windows. Defienetly no CPU spikes or random freezes.
I don’t have cyberpunk (waiting for PC upgrade) so I can’t compere but you can post the results if you want, it can be useful.

He started with Linux Mint from what I’ve seen.