I really want to be able to use my new Graphics card and I'm wondering whether some kind soul would be able help out. I'd be happy to get logged in with on 50% capacity as I appreciate that fixes are due in the kernel when it is released (whenever that will be).
IMHO your RX 590 aren't ready yet for GNU/Linux, you can assume the time needed by the Developers to adapt new hardware recently released to the market.
At the moment, I only have the basic drivers installed nothing special, because I can't figure out how to install the additional drivers. I believe that amdgpu itself was merged (as far as Arch is concerned) with 'video-linux' so it's unnecessary to add that one, but AMDGPU-Pro was not, but I can't figure out how to install that. Normally there's an auto-detection thing in Manjaro, but I can't get into Manjaro with the GPU plugged in and hotswapping a GPU sounds...risky.
Officially Arch is not supported by the AMD Propietary Driver for Linux, maybe through Centos 7.5 or Ubuntu 16.04 / 18.04 you could get better experience or looking for another user experiences on Arch / Manjaro forums.
If you decide to install amdgpu on GNU/Linux OSs mentioned above then welcome back, It will be a pleasure to try to help you and please don't forget read INFORMATION REQUIRED WHEN POSTING A QUESTION | Community
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Er. No, I'll do none of the above thanks and I'll still get it working. Because I'm just that good. . (With serious help from the Manjaro community).
So here's what I did to get it working.
1. Installed Manjaro-stable
2. Timeshift back up
3. ran `pamac build
4. rebooted plugging in my gpu.
Now... that did work and them some silly food (me) updated the linux-firmware and the fools at manjaro reverted to a buggy update (linux-firmware-20181214) which causes a blank screen or frozen splash screen, so in order to get past that bit I...
1. Unplugged my gpu and rebooted.
3 Rebooted, plugging in my gpu
4. Timeshift back up.
the FX 590 is not supported on Manjaro and I'm not sure whether it's utilizing its full potential, but it works and that's more than can be said for what I was dealing with prior.
Key message: Just because they say its unsupported doesn't mean you can't get it to work .
Thanks for share your experience, I have learned from your comments!!
All the best