Cannot change display driver in Software & Updates

[Christians]

Fresh 20.04 install: after changing from proprietary nvidia 440 driver to nouveau and restart, the Software & Updates does not allow me to change back to the proprietary drivers, as the buttons are now greyed out.

Workaround:
sudo ubuntu-drivers devices # shows available drivers
sudo apt install nvidia-driver-440

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: software-properties-gtk 0.98.9
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 24 15:20:08 2020
ExecutablePath: /usr/bin/software-properties-gtk
InstallationDate: Installed on 2020-04-24 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
InterpreterPath: /usr/bin/python3.8
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: N/A
SourcePackage: software-properties
UpgradeStatus: No upgrade log present (probably fresh install)

[Sebastien Bacher (seb128)]

Thank you for your bug report. Could you give the output of this command?

$ ubuntu-drivers debug

[Christians (script-vollbio)]

Thank you for looking into this. I have attached the requested file.

[Sebastien Bacher (seb128)]

Thanks

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.