We don't know what you tried previously, but you should NOT install AMD drivers from their page. The drivers are already present on your system, the most you could do is to add the proper PPA to your system. But let's leave that for later.
What do you want exactly? Change between the integrated and discrete cards? That's easy, you only need to use DRI_PRIME.
Let's clear things first, start from the very beginning.

Last edited by tuxintuxedo on 11 May 2020 at 11:48 am UTC

I agree with tuxintuxedo, installing AMDGPU-PRO was probably your first mistake. My suggestion would be that you install Ubuntu 20.04 from scratch so we start from zero.

Hi again,

Thanks for your quick reply.

I just want to use the discrete card. If I install Ubuntu 18.04 and plug the RX570 no display at all. Even when I disable the integrated card from the BIOS. That is why I went with the AMDGPU-PRO trial.

I will install a fresh Ubuntu 20.04 and will post back. So far with black screens all along, I have no clue whatsoever of what goes wrong in the first place.

Really sorry that I did not make myself clear in the first place.

You can start it up with the integrated one and we can discuss how to change under a running system. Black screen might just be a small issue (like needing nomodeset or a bad setting), so it's easier to solve while being able to see.

Last edited by tuxintuxedo on 11 May 2020 at 5:57 pm UTC

The no display you get with the RX570 is during/after boot or at which point?

@tuxintuxedo: once up and running with ubuntu 20.04 and the integrated one, what would you like me to check/report?

@damarrin: I can reach the BIOS w/o issue, I make it all the way to the grub screen and from then on, darkness is my only friend. If I try to switch to a terminal (Ctrl + F1 for instance) I see millions of errors which I tried to write down and search for solutions to no avail. This was about ten days ago and had no records about it. However, I will retry and post back with clear details of my status.

It feels so good to have quick and intense feedback despite my lack of clarity :-)

Quoting: garrop@tuxintuxedo: once up and running with ubuntu 20.04 and the integrated one, what would you like me to check/report?

try:
DRI_PRIME=1 glxinfo | grep OpenGL
And share the output.

Last edited by x_wing on 11 May 2020 at 10:50 pm UTC

What x_wing is saying.
And you can also share the output of
DRI_PRIME=0 glxinfo | grep OpenGL
Just to be sure.
If I remember right, you will have to install the mesa-utils package for glxinfo, but the Terminal will tell you everything.

Here we go (100% fresh Ubuntu 20.04):

egoi@MSI-B450:~$ DRI_PRIME=1 glxinfo | grep OpenGL

Command 'glxinfo' not found, but can be installed with:

sudo apt install mesa-utils

egoi@MSI-B450:~$ DRI_PRIME=0 glxinfo | grep OpenGL

Command 'glxinfo' not found, but can be installed with:

sudo apt install mesa-utils

---------------------------------

Installed mesa-utils and:

egoi@MSI-B450:~$ DRI_PRIME=1 glxinfo | grep OpenGL
OpenGL vendor string: X.Org
OpenGL renderer string: AMD RAVEN (DRM 3.35.0, 5.4.0-29-generic, LLVM 9.0.1)
OpenGL core profile version string: 4.6 (Core Profile) Mesa 20.0.4
OpenGL core profile shading language version string: 4.60
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 4.6 (Compatibility Profile) Mesa 20.0.4
OpenGL shading language version string: 4.60
OpenGL context flags: (none)
OpenGL profile mask: compatibility profile
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 3.2 Mesa 20.0.4
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
OpenGL ES profile extensions:
egoi@MSI-B450:~$ DRI_PRIME=0 glxinfo | grep OpenGL
OpenGL vendor string: X.Org
OpenGL renderer string: AMD RAVEN (DRM 3.35.0, 5.4.0-29-generic, LLVM 9.0.1)
OpenGL core profile version string: 4.6 (Core Profile) Mesa 20.0.4
OpenGL core profile shading language version string: 4.60
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 4.6 (Compatibility Profile) Mesa 20.0.4
OpenGL shading language version string: 4.60
OpenGL context flags: (none)
OpenGL profile mask: compatibility profile
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 3.2 Mesa 20.0.4
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
OpenGL ES profile extensions:

X.Org X server -- AMDGPU display driver (19.1.0-1)

and

Userspace interface to amdgpu-specific kernel DRM services -- runtime (2.4.101-2)

are both installed by default (all I get in synaptic under amdgpu).

Many thanks

Correct me if I am wrong, but all I see now is the integrated one. Everything is okay with it.
Did you insert the RX570? Isn't it loose or lacking power? Because currently it is not seen by the system.

Last edited by tuxintuxedo on 12 May 2020 at 11:59 am UTC

You are 100% right.

Give me a few moments and I will install the RX 570 and post back with the results. I did it that way because I have not been able to get any screen image with the GC in place so far.

See ya in a bit

Any updates to whether the problem was solved?

Okay.
Even if you get black screen, can you reach the GRUB menu? It should appear right after turning the PC on while pressing Escape (or Shift). I am not talking about the BIOS/UEFI.

Here I go:

My BIOS has Integrated Graphics Configuration with "Integrated Graphics" in [Auto Mode]. If I disable it, I get the same results that I am about to explain:

WITH THE RX570 plugged in:

I reach grub no problem and let it go:

Right into it, first warning message:

1- "Completion wait loop time_out" about a gazillion times

2- After a while I reach this screen where my message is:

iommu ivhdo:AMD-Vi event logged [IOTLB_INV_TIMEOUT device=25.00 address 0x40cd9e3f0

3- I am able to see some messages in between, "sofreset failed", i.e.

4- I finally make it to the point of initramfs where my command capabilities are limited and no way of performing much in the line of your proposals.

5- When I unplug the thing and try to launch Ubuntu with the integrated one, I get the info that /dev/sd5 requires manual fsck (from the same initramgfs screen. I fsck the drive and it tells me that some directory was corrupted.

6- Once fsck completed, reboot brings me back to Ubuntu 20.04 with the integrated one and my RX570 out of the game completely.

Did I just happen to receive a faulty unit? As I stated right from the beginning, I has just been purchased, no miles on it...

Many thanks

Forgot to mention that if I choose recovery mode in the grub menu, I get the same results.

Thanks

Could you try it with Ubuntu 18.04.2 or .3 (the number is important)? With the RX570 plugged in. Live mode is enough.
It might be a kernel bug affecting you so this should help us learn more. The card itself should already be supported for a while now.
Also, iommu problems might be caused by the motherboard or CPU.
The reason I asked about GRUB is because you could try some boot parameters with it.

Last edited by tuxintuxedo on 12 May 2020 at 1:21 pm UTC

Quoting: garropMy BIOS has Integrated Graphics Configuration with "Integrated Graphics" in [Auto Mode]. If I disable it, I get the same results that I am about to explain:

If you leave your integrated graphics enabled, are you able to boot to your OS with the RX 570? There should be no problem to have both GPUs enabled and if there is a hardware issue with the 570, the integrated will allow us to have a UI in order to do some checks.

@tuxintuxedo: I gave it a try with Live USB Ubuntu 18.04.03. Same errors on black screen as previously stated (1 and 2) and finally I reach the Ubuntu initial screen with the 5 dots below the logo, but never reach the login screen.

@The_Aquabat: I will do as proposed and report back in a minute.

@x_wing: I recall I had the same results every time the RX 570 is there, but will retry and report back in a minute.

Thanks

You should also try the nomodeset boot parameter, aside from the iommu=pt one.
My guess is that not the RX570 is problematic, but the motherboard + CPU combo are behind the problem with possible kernel bugs.

@x_wings:

If both cards are present, same errors at boot plus a bunch of RIP
RDX
RBX
RCX
RSI
RD1...

errors and screen freezes w/o any option available

@tuxintuxedo

will try that in a minute.