Only integrated AMD GPU works on laptop with hybrid AMD / Nvidia GPUs

I have a laptop with both AMD Raven and Nvidia GTX 1050 video adapters. After installing the nvidia-driver-440 package through Ubuntu's additional drivers" tool, only the AMD GPU could be used.

To fix this, I had to add “Option “PrimaryGPU” “Yes”” to /usr/share/X11/xorg.conf.d/10-nvidia.conf

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
BootLog: Error: [Errno 13] Permission non accordée: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: GNOME
Date: Wed Apr 29 08:05:46 2020
DistUpgraded: 2020-04-24 17:27:13,114 ERROR got error from PostInstallScript ./xorg_fix_proprietary.py (g-exec-error-quark: L’exécution du processus fils « ./xorg_fix_proprietary.py » a échoué (Aucun fichier ou dossier de ce type) (8))
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
 nvidia, 440.64, 5.4.0-26-generic, x86_64: installed
 nvidia, 440.64, 5.4.0-28-generic, x86_64: installed
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes
GraphicsCard:
 Subsystem: ASUSTeK Computer Inc. GP107M [GeForce GTX 1050 Mobile] [1043:1bb1]
 Advanced Micro Devices, Inc. [AMD/ATI] Picasso [1002:15d8] (rev c2) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Picasso [1043:1bb1]
InstallationDate: Installed on 2020-02-07 (81 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: ASUSTeK COMPUTER INC. VivoBook_ASUSLaptop X570DD_D570DD
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-26-generic root=UUID=decd423a-61f1-452c-bf0d-16b54ea1b5ad ro quiet splash nouveau.modeset=0 vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to focal on 2020-04-24 (4 days ago)
dmi.bios.date: 06/28/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: X570DD.300
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: X570DD
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX570DD.300:bd06/28/2019:svnASUSTeKCOMPUTERINC.:pnVivoBook_ASUSLaptopX570DD_D570DD:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX570DD:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: VivoBook
dmi.product.name: VivoBook_ASUSLaptop X570DD_D570DD
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.4-2ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1