[Bug 110416] Newly installed Kubuntu 18.04 brokes after try to install amdgpu for RX 550

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110416

            Bug ID: 110416
           Summary: Newly installed Kubuntu 18.04 brokes after try to
                    install amdgpu for RX 550
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: hic.sunt.dracones.89 at gmail.com

I tried install this driver for RX 550
(https://drivers.amd.com/drivers/linux/amdgpu-pro-18.50-756341-ubuntu-18.04.tar.xz)
3 times and after installation the system doesn't begin, it just hold on a
black screen saying:

[  8.6668039] ccp 0000:08:00:02: sev command 0x4 timed out, disabling PSP
[  8.6668075] ccp 0000:08:00:02: SEV: failed to get status. Error: 0x0

In that screen system doesn't answer any command.
If I change to tty2 (ctrl+alt+f2) I could login on the terminal e do
amdgpu-uninstall and reboot (it works one time) and system would start
normally.

So I couldn't fix that I had to reinstall the hole system (Kubuntu).

Base-Board: GA-A320M-S2H
BIOS version: F24
CPU: Ryzen 5 2600
GPU: RX 550 4GT - MSI
RAM: 8Gb HyperX Fury
Font: Bluecase 500W

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