R9 390x has garbage performance on Linux - please help

[Xen0sys]

Well… yeah? not 32-bit - Just the standard Ubuntu Desktop you download from https://www.ubuntu.com/download/desktop

4.18.0-16-generic #17-Ubuntu SMP Fri Feb 8 00:06:57 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

This was one of the guides I tried:

AMD R9 390 finally usable on Linux!

I have a Sapphire Nitro 390X (Hawaii XT I believe) and I’m using the following args: radeon.cik_support=0 amdgpu.cik_support=1 amdgpu.dc=1 amdgpu.dpm=1 But since I’ve upgraded to kernel 4.19 my system can’t boot with amdgpu enabled. It just shows black screen after grub with no logs and kernel dumps. It just freezes right after selecting Linux from boot. I’ve tried to play with these values but disabling dc and dpm and the problem persists. Booting with radeon on 4.19 or amdgpu on 4.18 works perfectly. I’m using OpenSuSE Tumbleweed. I wonder if there is an issue on my side.