[SOLVED] AMD Radeon only for ubuntu 20.04

[slamelov]

Hi

I'm trying to use Kubuntu 20.10 with an AMD Radeon RX 580 Graphic card. But AMD Driver is only for 20.04, so, I have to enter in recovery mode because I got a black screen when I boot in normal mode.

If I try to install this driver:
https://amdgpu-install.readthedocs.io/en/latest/

I got the message:

ERROR: This package can only be installed on Ubuntu 20.04.

Is there anything I can do?

Thanks

[claydoh]

You do not need the AMDGPU-PRO driver, that is for professional workstations mostly. The open source drivers you already have are the preferred ones, even by AMD themselves.
If the PRO does not install on 20.10, it is because AMD don't support it for newer releases yet.

I just finished a session of Metro Exodus on my similar Rx 480 card, using the open drivers


What you may find very useful is updated Mesa drivers:
https://itsfoss.com/install-mesa-ubuntu/ this can help with performance.

[slamelov]

Thanks for the answer.

But I have a problem, Kubuntu does not start in normal mode, only in recovery mode. I thought it was for the AMD driver.

What could be the problem?

[claydoh]

Without knowing more it is very hard to say
System info, OS info, any symptoms you are experiencing, any customization done, what happened before you saw this happen. things like this.

[slamelov]

I have bought this kit:
https://es.aliexpress.com/item/33043...257563c0OVAuAm
https://www.chaslinux.com/article/in...bo-motherboard
And followed this bios setup.
https://www.youtube.com/watch?v=G4t49Rc8xfk
Graphic card is a Radeon RX580.
So, I tried do install Kubuntu 20.10 from USB, but I had to choose "graphic safe mode" because it does not boot, after that, installation was ok.
But It does not boot in normal mode, it goes to a black screen.
I can boot choosing recovery mode, but only at 800x600 screen resolution.
I have tried to install the AMD driver, but, as you have said, that was not the problem.

So, I don't know whats wrong.

[claydoh]

My guess is something in the bios setup, but I can't say what. There are a LOT of settings in there.


Plus it is an AliExpress special, which has to be taken into consideration ....................

[slamelov]

These boards are also sold on amazon, they are reliable, judging by the information that can be found on the internet.

Here the problem is with Kubuntu, something happens with some parameter that prevents booting in normal graphical mode. It doesn't happen to me with other Linux distributions.

I could install another distro, or Windows, but I wanted to use Kubuntu, I really like this distro.

[Snowhog]

From what I'm finding on the 'Net, AMD doesn't have support for the Radeon RX 580 beyond Ubuntu 20.04 (yet), and that would imply that the Kernel for 20.10 doesn't have a suitable driver for this GPU either.

[Don B. Cilly]

If I may ask... why 20.10? What's wrong with 20.04? It's LTS and all...

[slamelov]

Nothing wrong, I simply installed the latest version that was available on kubuntu.org . I may have to install 20.04 or wait for AMD support.

[Don B. Cilly]

Or try KDE neon, which is "conservative" in terms of kernels - and apps - . and "ahead" in terms of Plasma.
Otherwise it's pretty much the same as Kubuntu.

[claydoh]

Again, your video card is fully supported and fully performant in Linux without any extra driver to install.

There is something wrong on your system, but determining what it is may take some work.

The OS install could be borked
The mainboard may be mis-configured
Or the mainboard may need some kernel parameter added to grub
May need to disable secure boot (if it is enabled)


So lets get info about the video card an what driver it is actually using:

[FONT=monospace][COLOR=#000000]lspci -nnk | grep -i vga -A3[/COLOR][/FONT]

here is mine:

[FONT=monospace][COLOR=#54ff54][B]claydoh@hp[/B][/COLOR][COLOR=#000000]:[/COLOR][COLOR=#5454ff][B]~[/B][/COLOR][COLOR=#000000]$ lspci -nnk | grep -i vga -A3 [/COLOR]
01:00.0 [COLOR=#ff5454][B]VGA[/B][/COLOR][COLOR=#000000] compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/5[/COLOR]
70X/580/580X/590] [1002:67df] (rev c7) 
Subsystem: XFX Pine Group Inc. Radeon RX 480 [1682:9480] 
Kernel driver in use: amdgpu 
Kernel modules: amdgpu
[/FONT]

My rx480 here is the exact same graphics chip as an RX 580, the 580 just has a small bump in clock speeds.



Also, we can look for any log messages relating to the stock amdgpu driver, maybe showing error messages:

dmesg | grep amd

[slamelov]

May be not for this kernel...

Remember I had to enter in recovery mode:

lspci -nnk | grep -i vga -A3

04:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] [1002:67df] (rev e7)
      Subsystem: XFX Pine Group Inc. Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] [1682:c580]
      Kernel modules: amdgpu
04:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590] [1002:aaf0]

sudo dmesg | grep amd

[    1.536797] [drm:amdgpu_init [amdgpu]] *ERROR* VGACON disables amdgpu kernel modesetting.

Thanks!

[slamelov]

I think that I have found the solution:

https://bugzilla.kernel.org/show_bug.cgi?id=200695

But I don't know how to set this value:

amdgpu.dc=0

[slamelov]

Yes! Solved.

Thanks a lot.

I edited the /etc/default/grub file and added:

GRUB_CMDLINE_LINUX="amdgpu.dc=0"