Bonjour xubu1957, merci de t'intéresser au problème. Voici les retours :
boris@machinux:~$ lspci -vnn | grep -A 12 '\''[030[02]\]' | grep -Ei "vga|3d|display|kernel"
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GF119 [GeForce GT 610] [10de:104a] (rev a1) (prog-if 00 [VGA controller])
Kernel modules: nvidiafb, nouveau
boris@machinux:~$
boris@machinux:~$ ubuntu-drivers devices
== /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0 ==
modalias : pci:v000010DEd0000104Asv00001043sd0000847Bbc03sc00i00
vendor : NVIDIA Corporation
model : GF119 [GeForce GT 610]
driver : nvidia-340 - distro non-free
driver : nvidia-driver-390 - distro non-free recommended
driver : xserver-xorg-video-nouveau - distro free builtin
boris@machinux:~$
boris@machinux:~$ uname -a
Linux machinux 5.8.0-36-generic #40~20.04.1-Ubuntu SMP Wed Jan 6 10:15:55 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
boris@machinux:~$
boris@machinux:~$ dpkg -l | grep nvidia
ii libnvidia-cfg1-390:amd64 390.138-0ubuntu0.20.04.1 amd64 NVIDIA binary OpenGL/GLX configuration library
ii libnvidia-common-390 390.138-0ubuntu0.20.04.1 all Shared files used by the NVIDIA libraries
ii libnvidia-compute-390:amd64 390.138-0ubuntu0.20.04.1 amd64 NVIDIA libcompute package
ii libnvidia-compute-390:i386 390.138-0ubuntu0.20.04.1 i386 NVIDIA libcompute package
ii libnvidia-decode-390:amd64 390.138-0ubuntu0.20.04.1 amd64 NVIDIA Video Decoding runtime libraries
ii libnvidia-decode-390:i386 390.138-0ubuntu0.20.04.1 i386 NVIDIA Video Decoding runtime libraries
ii libnvidia-encode-390:amd64 390.138-0ubuntu0.20.04.1 amd64 NVENC Video Encoding runtime library
ii libnvidia-encode-390:i386 390.138-0ubuntu0.20.04.1 i386 NVENC Video Encoding runtime library
ii libnvidia-fbc1-390:amd64 390.138-0ubuntu0.20.04.1 amd64 NVIDIA OpenGL-based Framebuffer Capture runtime library
ii libnvidia-fbc1-390:i386 390.138-0ubuntu0.20.04.1 i386 NVIDIA OpenGL-based Framebuffer Capture runtime library
ii libnvidia-gl-390:amd64 390.138-0ubuntu0.20.04.1 amd64 NVIDIA OpenGL/GLX/EGL/GLES GLVND libraries and Vulkan ICD
ii libnvidia-gl-390:i386 390.138-0ubuntu0.20.04.1 i386 NVIDIA OpenGL/GLX/EGL/GLES GLVND libraries and Vulkan ICD
ii libnvidia-ifr1-390:amd64 390.138-0ubuntu0.20.04.1 amd64 NVIDIA OpenGL-based Inband Frame Readback runtime library
ii libnvidia-ifr1-390:i386 390.138-0ubuntu0.20.04.1 i386 NVIDIA OpenGL-based Inband Frame Readback runtime library
ii nvidia-compute-utils-390 390.138-0ubuntu0.20.04.1 amd64 NVIDIA compute utilities
ii nvidia-dkms-390 390.138-0ubuntu0.20.04.1 amd64 NVIDIA DKMS package
ii nvidia-driver-390 390.138-0ubuntu0.20.04.1 amd64 NVIDIA driver metapackage
ii nvidia-kernel-common-390 390.138-0ubuntu0.20.04.1 amd64 Shared files used with the kernel module
ii nvidia-kernel-source-390 390.138-0ubuntu0.20.04.1 amd64 NVIDIA kernel source package
ii nvidia-prime 0.8.14 all Tools to enable NVIDIA's Prime
ii nvidia-settings 440.82-0ubuntu0.20.04.1 amd64 Tool for configuring the NVIDIA graphics driver
ii nvidia-utils-390 390.138-0ubuntu0.20.04.1 amd64 NVIDIA driver support binaries
ii screen-resolution-extra 0.18build1 all Extension for the nvidia-settings control panel
ii xserver-xorg-video-nvidia-390 390.138-0ubuntu0.20.04.1 amd64 NVIDIA binary Xorg driver
boris@machinux:~$
boris@machinux:~$ dpkg -l | grep -v ^ii
Souhait=inconnU/Installé/suppRimé/Purgé/H=à garder
| État=Non/Installé/fichier-Config/dépaqUeté/échec-conFig/H=semi-installé/W=attend-traitement-déclenchements
|/ Err?=(aucune)/besoin Réinstallation (État,Err: majuscule=mauvais)
||/ Nom Version Architecture Description
+++-==========================================-===================================-============-==================================================================================================================================================================================
rc anydesk 5.5.6 amd64 AnyDesk is the fastest remote desktop software on the market. It allows for new usage scenarios and applications that have not been possible with current remote desktop software.
rc blueman 2.1.2-1 amd64 Graphical bluetooth manager
rc cinnamon-common 4.4.8-4 all Innovative and comfortable desktop (Common data files)
rc gir1.2-nemo-3.0 4.4.2-2 amd64 libraries for nemo components - gir bindings
rc linux-image-5.4.0-26-generic 5.4.0-26.30 amd64 Signed kernel image generic
rc linux-image-5.4.0-40-generic 5.4.0-40.44 amd64 Signed kernel image generic
rc linux-image-5.4.0-42-generic 5.4.0-42.46 amd64 Signed kernel image generic
rc linux-image-5.4.0-45-generic 5.4.0-45.49 amd64 Signed kernel image generic
rc linux-image-5.4.0-47-generic 5.4.0-47.51 amd64 Signed kernel image generic
rc linux-image-5.4.0-48-generic 5.4.0-48.52 amd64 Signed kernel image generic
rc linux-image-5.4.0-51-generic 5.4.0-51.56 amd64 Signed kernel image generic
rc linux-image-5.4.0-52-generic 5.4.0-52.57 amd64 Signed kernel image generic
rc linux-image-5.4.0-53-generic 5.4.0-53.59 amd64 Signed kernel image generic
rc linux-image-5.4.0-54-generic 5.4.0-54.60 amd64 Signed kernel image generic
rc linux-image-5.4.0-56-generic 5.4.0-56.62 amd64 Signed kernel image generic
rc linux-modules-5.4.0-26-generic 5.4.0-26.30 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-40-generic 5.4.0-40.44 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-42-generic 5.4.0-42.46 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-45-generic 5.4.0-45.49 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-47-generic 5.4.0-47.51 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-48-generic 5.4.0-48.52 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-51-generic 5.4.0-51.56 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-52-generic 5.4.0-52.57 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-53-generic 5.4.0-53.59 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-54-generic 5.4.0-54.60 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-56-generic 5.4.0-56.62 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-26-generic 5.4.0-26.30 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-40-generic 5.4.0-40.44 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-42-generic 5.4.0-42.46 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-45-generic 5.4.0-45.49 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-47-generic 5.4.0-47.51 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-48-generic 5.4.0-48.52 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-51-generic 5.4.0-51.56 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-52-generic 5.4.0-52.57 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-53-generic 5.4.0-53.59 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-54-generic 5.4.0-54.60 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-56-generic 5.4.0-56.62 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc metacity-common 1:3.36.1-1 all shared files for the Metacity window manager
rc sane 1.0.14-15 amd64 scanner graphical frontends
boris@machinux:~$