VGACON disables amdgpu kernel modesetting

Asked by C4-timah on 2018-11-02

I was unable to install or try Ubuntu 18.04.1 from CD or USB without getting an immediate black screen. It wasn't until I selected 'nomodeset' under F6 (google couldn't even tell me that much) that I was able to both Try and then Install Ubuntu. Unfortunately this has resulted in a generic driver that provides no 3D or open gl. I have a MSI AMD Radeon RX580 Gaming X 8GB. Currently installed for the graphics drivers is 'llvmpipe (LLVM 6.0, 128 bits)'. I have attempted to install the AMD linux graphics driver, however, I never get back to the desktop as there is nothing but a black screen again at bootup. I am new to linux/ubuntu. My only experience has been dabbling with RPi3 and ODROID images. Any help on fixing this would be great. I'd like to play Arma 3 from a linux rig and get away from windows.

Note: I have since reinstalled Ubuntu 18.04.1 using the F6 option to get to the desktop as I could not figure out how to get rid of the blackscreen from installing the proper video drivers. I have made no attempt to reinstall the correct AMD drivers yet.

Question information

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Status:
Open
For:
Ubuntu Edit question
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Last query:
2018-11-06
Last reply:
2018-11-02

Does the system have a make and model?

C4-timah (c4-timah) said : #3

CPU: AMD A10-7890k
Mainboard: Asrock Extreme6+
Memory: 32GB
SSD: 256GB Toshiba
Graphics: MSI AMD Radeon RX580 Gaming X 8GB
Power Supply: EVGA 1200W

C4-timah (c4-timah) said : #4

WARNING: nomodeset detected in kernel parameters, amdgpu requires KMS

How do I enable KMS? I cannot use AMD drivers with nomodeset enabled! Yet its the only way to get to the desktop! HELP!

C4-timah (c4-timah) said : #5

So, I have decided to run Ubuntu 16.04 LTS. No issues. The Ubuntu AMD default video driver installed and 3D acceleration and OpenGL was enabled automatically. I didn't need to download or install any video drivers or add 'nomodeset' during installation so I could see the screen during install and the desktop after boot. I was able to play Arma 3 immediately after install!!! I am able to stream videos from my Plex server with ease. But with 18.04.1 it is horribly choppy which makes it unwatchable and 3D acceleration and OpenGL are disabled so no video games.

What is the problem with Ubuntu 18.04.1?!?!?! I would love to use 18.04.1, but the only way to install or get to the desktop is to use 'nomodeset' which disables KMS. 3D acceleration and OpenGL are not available because of this. Installing AMD supported drivers doesn't help because you just get a black screen again even if you do somehow manage to disable 'nomodeset'. I have been unsuccessful in finding documentation to resolve this issue. Responses regarding what seems to be a simple video driver issue have not been forthcoming. I like the look and feel of 18.04.1, but 16.04 is the only version that isn't bugged for what I'm trying to using it for.

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