Cfrgtkky

First of all sory for any nonsense, but after days and days of trying to set it up and reading forums, I still fell like I have missed something important. I am totaly new in Linux world. And sorry for bad english :)

So, previously using Windows 10, now dual booting W10 and Ubuntu 18.04.1 LTS with hopes to learn about it and eventualy switch to it. But seem like graphic card does not let me.
The first and biggest obstacle with which I am dealing now for few days is Radeon R9 390. Black screens, tearing picture (when triyng to install Linux Mint),... Ok, I quickly found instructions to add "nomodeset" at start when installing Ubuntu, so now I do this procedure:

• Booting in USB with Ubuntu ISO, pressing "e" to add "nomodeset" (without nomodeset I get black screen),


• installation succesfull,


• restart,


• in grub2 before starting freshly installed Ubuntu again adding "nomodeset".

So when I am on installed ubuntu desktop, first I update sistem, restart, again in grub add " nomodeset", then I go to "AMD download drivers" website, download amdgpu-pro drivers, extract drivers, go to Terminal, write "cd amdgpu-pro-17.30-NNNNNN", then "./amdgpu-pro-install –y"......
....instalation seems to go nicely, but then I get this line:

"WARNING: nomodeset detected in kernel parameters, amdgpu requires KMS"

Terminal text
http://shrani.si/f/R/GX/3nIBaOOE/img20181220125732.jpg

What does this KMS mean?
Now I do not know if the drivers were installed. If I restart and select Ubuntu in grub menu, I get this list and I am stuck. The only thing I know to do on this point is to install Ubuntu again... And hope I will magicly find something. :P

http://shrani.si/f/3X/aa/3TfGnJAr/img20181230224309.jpg

After installing AMD drivers, and restarting, should I change anything in grub? I have tried, as suggested on one forum, to add "blacklist=radeon".

Grub after restart http://shrani.si/f/W/fR/jcyEbL0/img20181230224141.jpg

Please help me. Thanks :)

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*EDITED:
I have tried to install additional drivers, like Kristopher Ives suggested in comment, but here is the next problem. There are no additional drivers available. (Looks like this: https://i.stack.imgur.com/jFgJI.png )
To solve this i have tried this solutions
- I have added repository with "sudo add-apt-repository ppa:xorg-edgers/ppa AND sudo apt-get update"

List is still empty.
I am totally lost :( Am I missing something? Is there any other way?

Firstly, I have tried to install proprietary AMD drivers, since some says these are better, but with no luck (problem described above). After this, I have no luck with additional drivers... How is this possible. Should I buy some other video card?

I don't have an answer, but I'm experiencing exactly the same thing. amdgpu-pro-18.50-708488-ubuntu-18.04 driver doesn't work and the generic display driver installed with Ubuntu 18.04.1 LTS doesn't work either. I am only able to use recovery mode (NOMODESET) to run my system, and am still needing a solution. I'll try opening a request with AMD. My system processor is an AMD Ryzen 5 1600 six core, my graphics card is a Radeon RX570. Linux kernel supplied with Ubuntu is version 4.15.0-43-generic.

I solved this by installing 18.04 with a nvidia card.
Then, installed the amd (amdgpu pro 18.50 in my case) drivers.
Shutdown, remove nvidia card, and boot.

Hope this helps.
:)
AndyBurn

Part 2:
You can also install using another PC.
I used a G4400 Intel mobo (nvidia video) to install Ubuntu Mate 18.04 OS and amdgpu drivers before shutting down and moving the hdd (nvme) to my radeon 2400G.
It worked like a charm. I used the same AMD drivers as you.

Remove your radeon card, and try nvidia, at least for the short term.

:)