Ubuntu not loading/detecting discrete GPU after update

[Matteus Forelli]

After the most recent update Ubuntu 20.04.1 no longer detects or lists the Radeon 560X dedicated GPU in my laptop (the About sections lists the Vega 8 iGPU twice...). Even after a complete clean reinstall the issue persists. Even clicking "Launch using Dedicated Graphics Card" is broken, and it crashes X, which reloads itself.
I'm not the most knowledgeable on the graphics stack, so not sure what I need to provide!

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-control-center 1:3.36.4-0ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-48.52-generic 5.4.60
Uname: Linux 5.4.0-48-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.9
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Sep 25 05:43:36 2020
ExecutablePath: /usr/bin/gnome-control-center
InstallationDate: Installed on 2020-09-25 (0 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this issue and helping to make Ubuntu better. Examining the information you have given us, this does not appear to be a bug report so we are closing it and converting it to a question in the support tracker. We understand the difficulties you are facing, but it is better to raise problems you are having in the support tracker at https://answers.launchpad.net/ubuntu if you are uncertain if they are bugs. You can also find help with your problem in the support forum of your local Ubuntu community http://loco.ubuntu.com/ or asking at https://askubuntu.com or https://ubuntuforums.org. For help on reporting bugs, see https://help.ubuntu.com/community/ReportingBugs.

[Daniel van Vugt (vanvugt)]

Similar to the above comment, I am not sure this is a bug or just a change in GUI.

If you think it is a bug then please help us to identify the issue by running these commands:

  lspci -kv > lspci.txt
  journalctl -b0 > journal.txt

and attach the resulting text files here.

[Launchpad Janitor (janitor)]

[Expired for Ubuntu because there has been no activity for 60 days.]