Second screen blank on AMD+NVIDIA laptop

[George Salukvadze]

If I plugin the second screen (external monitor) using HDMI before logging into my session, the second screen is blank, although it receives a signal.
In order to get the image, I have to either deactivate and reactivate it from Display Settings, or move any window to it.
This happens using the following config:
Laptop: Lenovo Legion 7 16ACHg6
CPU: AMD Ryzen 9 5900 HX APU
RAM: 32 GB DDR4-3200
GPU: iGPU AMD Vega 8 + dGPU NVIDIA GeForce 3080 Mobile GPU (Max-P)
Main laptop screen is powered by iGPU whereas external screen is powered by dGPU

ProblemType: Bug
DistroRelease: Ubuntu 22.10
Package: xorg 1:7.7+23ubuntu2
ProcVersionSignature: Ubuntu 5.19.0-38.39-generic 5.19.17
Uname: Linux 5.19.0-38-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.capabilities.gpu0: Error: path was not a regular file.
.proc.driver.nvidia.capabilities.mig: Error: path was not a regular file.
.proc.driver.nvidia.gpus.0000.01.00.0: Error: path was not a regular file.
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.suspend: suspend hibernate resume
.proc.driver.nvidia.suspend_depth: default modeset uvm
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 525.89.02 Wed Feb 1 23:23:25 UTC 2023
 GCC version:
ApportVersion: 2.23.1-0ubuntu3
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Tue Mar 28 11:10:36 2023
DistUpgraded: Fresh install
DistroCodename: kinetic
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 NVIDIA Corporation GA104M [GeForce RTX 3080 Mobile / Max-Q 8GB/16GB] [10de:24dc] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Lenovo GA104M [GeForce RTX 3080 Mobile / Max-Q 8GB/16GB] [17aa:3a58]
 Advanced Micro Devices, Inc. [AMD/ATI] Cezanne [1002:1638] (rev c4) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Cezanne [17aa:3a58]
InstallationDate: Installed on 2023-02-09 (46 days ago)
InstallationMedia: Ubuntu 22.10 "Kinetic Kudu" - Release amd64 (20221020)
MachineType: LENOVO 82N6
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.19.0-38-generic root=UUID=2a43fd27-b65c-4d7a-bc19-b001521b0771 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/21/2022
dmi.bios.release: 1.59
dmi.bios.vendor: LENOVO
dmi.bios.version: GKCN59WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76461 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Legion 7 16ACHg6
dmi.ec.firmware.release: 1.59
dmi.modalias: dmi:bvnLENOVO:bvrGKCN59WW:bd11/21/2022:br1.59:efr1.59:svnLENOVO:pn82N6:pvrLegion716ACHg6:rvnLENOVO:rnLNVNB161216:rvrSDK0T76461WIN:cvnLENOVO:ct10:cvrLegion716ACHg6:skuLENOVO_MT_82N6_BU_idea_FM_Legion716ACHg6:
dmi.product.family: Legion 7 16ACHg6
dmi.product.name: 82N6
dmi.product.sku: LENOVO_MT_82N6_BU_idea_FM_Legion 7 16ACHg6
dmi.product.version: Legion 7 16ACHg6
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.113-2
version.libgl1-mesa-dri: libgl1-mesa-dri 22.2.5-0ubuntu0.1
version.libgl1-mesa-glx: libgl1-mesa-glx 22.2.5-0ubuntu0.1
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.4-2ubuntu1.6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-3
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1