Ok merci.
lspci -vnn | grep -A12 '\''[030[02]]' | grep -Ei "vga|3d|display|kernel" :
00:02.0 VGA compatible controller [0300]: Intel Corporation UHD Graphics 630 (Mobile) [8086:3e9b] (prog-if 00 [VGA controller])
Kernel driver in use: i915
Kernel modules: i915
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation TU106M [GeForce RTX 2070 Mobile] [10de:1f10] (rev a1) (prog-if 00 [VGA controller])
Kernel driver in use: nvidia
Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia
ubuntu-drivers devices :
== /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0 ==
modalias : pci:v000010DEd00001F10sv00001462sd00001277bc03sc00i00
vendor : NVIDIA Corporation
model : TU106M [GeForce RTX 2070 Mobile]
driver : nvidia-driver-440 - distro non-free recommended
driver : nvidia-driver-435 - distro non-free
driver : xserver-xorg-video-nouveau - distro free builtin
== /sys/devices/pci0000:00/0000:00:14.3 ==
modalias : pci:v00008086d0000A370sv00001A56sd00001552bc02sc80i00
vendor : Intel Corporation
model : Wireless-AC 9560 [Jefferson Peak]
manual_install: True
driver : backport-iwlwifi-dkms - distro free
dpkg -l | grep nvidia :
ii libnvidia-cfg1-440:amd64 440.82+really.440.64-0ubuntu6 amd64 NVIDIA binary OpenGL/GLX configuration library
ii libnvidia-common-440 440.82+really.440.64-0ubuntu6 all Shared files used by the NVIDIA libraries
ii libnvidia-compute-440:amd64 440.82+really.440.64-0ubuntu6 amd64 NVIDIA libcompute package
ii libnvidia-compute-440:i386 440.82+really.440.64-0ubuntu6 i386 NVIDIA libcompute package
ii libnvidia-decode-440:amd64 440.82+really.440.64-0ubuntu6 amd64 NVIDIA Video Decoding runtime libraries
ii libnvidia-decode-440:i386 440.82+really.440.64-0ubuntu6 i386 NVIDIA Video Decoding runtime libraries
ii libnvidia-encode-440:amd64 440.82+really.440.64-0ubuntu6 amd64 NVENC Video Encoding runtime library
ii libnvidia-encode-440:i386 440.82+really.440.64-0ubuntu6 i386 NVENC Video Encoding runtime library
ii libnvidia-extra-440:amd64 440.82+really.440.64-0ubuntu6 amd64 Extra libraries for the NVIDIA driver
ii libnvidia-fbc1-440:amd64 440.82+really.440.64-0ubuntu6 amd64 NVIDIA OpenGL-based Framebuffer Capture runtime library
ii libnvidia-fbc1-440:i386 440.82+really.440.64-0ubuntu6 i386 NVIDIA OpenGL-based Framebuffer Capture runtime library
ii libnvidia-gl-440:amd64 440.82+really.440.64-0ubuntu6 amd64 NVIDIA OpenGL/GLX/EGL/GLES GLVND libraries and Vulkan ICD
ii libnvidia-gl-440:i386 440.82+really.440.64-0ubuntu6 i386 NVIDIA OpenGL/GLX/EGL/GLES GLVND libraries and Vulkan ICD
ii libnvidia-ifr1-440:amd64 440.82+really.440.64-0ubuntu6 amd64 NVIDIA OpenGL-based Inband Frame Readback runtime library
ii libnvidia-ifr1-440:i386 440.82+really.440.64-0ubuntu6 i386 NVIDIA OpenGL-based Inband Frame Readback runtime library
rc linux-modules-nvidia-440-5.4.0-26-generic 5.4.0-26.30+2 amd64 Linux kernel nvidia modules for version 5.4.0-26
ii linux-modules-nvidia-440-5.4.0-28-generic 5.4.0-28.32 amd64 Linux kernel nvidia modules for version 5.4.0-28
ii linux-modules-nvidia-440-5.4.0-29-generic 5.4.0-29.33 amd64 Linux kernel nvidia modules for version 5.4.0-29
ii linux-modules-nvidia-440-5.4.0-31-generic 5.4.0-31.35 amd64 Linux kernel nvidia modules for version 5.4.0-31
ii linux-modules-nvidia-440-5.4.0-33-generic 5.4.0-33.37 amd64 Linux kernel nvidia modules for version 5.4.0-33
ii linux-modules-nvidia-440-generic-hwe-20.04 5.4.0-33.37 amd64 Extra drivers for nvidia-440 for generic-hwe-20.04
ii nvidia-compute-utils-440 440.82+really.440.64-0ubuntu6 amd64 NVIDIA compute utilities
ii nvidia-driver-440 440.82+really.440.64-0ubuntu6 amd64 NVIDIA driver metapackage
ii nvidia-kernel-common-440 440.82+really.440.64-0ubuntu6 amd64 Shared files used with the kernel module
ii nvidia-kernel-source-440 440.82+really.440.64-0ubuntu6 amd64 NVIDIA kernel source package
ii nvidia-prime 0.8.14 all Tools to enable NVIDIA's Prime
ii nvidia-settings 440.64-0ubuntu1 amd64 Tool for configuring the NVIDIA graphics driver
ii nvidia-utils-440 440.82+really.440.64-0ubuntu6 amd64 NVIDIA driver support binaries
ii screen-resolution-extra 0.18build1 all Extension for the nvidia-settings control panel
ii xserver-xorg-video-nvidia-440 440.82+really.440.64-0ubuntu6 amd64 NVIDIA binary Xorg driver
PS : quand je branche le cable HDMI sur mon PC, rien ne se passe. Et même dans configuration d'affichage, le 2ème écran n'y ai pas.