Ubuntu 20.04 : HDMI output not working Nvidia GT 620M

On afresh install Ubuntu 20.04 with the NVIDIA graphic card Geforce GF108M [GeForce GT 620M/630M/635M/640M LE], the HDMI output is not working and the driver seems not to be working.

ubuntu-drivers devices
== /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0 ==
modalias : pci:v000010DEd00000DE9sv00001043sd00001477bc03sc00i00
vendor   : NVIDIA Corporation
model    : GF108M [GeForce GT 620M/630M/635M/640M LE]
driver   : nvidia-driver-390 - distro non-free recommended
driver   : nvidia-340 - distro non-free
driver   : xserver-xorg-video-nouveau - distro free builtin

There are two missing dependencies : xserver-xorg-video-nvidia-390 and ibnvidia-cfg1-390

Solution 1:

This command failed on a fresh install for Ubuntu 20.04 with a

sudo ubuntu-drivers autoinstall

There were 2 missing dependencies : xserver-xorg-video-nvidia-390 and ibnvidia-cfg1-390

Installing both manually

sudo apt-get install libnvidia-cfg1-390
sudo apt-get install xserver-xorg-video-nvidia-390D
sudo ubuntu-drivers autoinstall
sudo reboot

solved the issue. Hope this can help.

Solution 2:

I had the same problem after upgrading to Ubuntu 20.04 TLS (64 bit), it was working fine with 18.04 TLS on my DELL Laptop E6420.

Graphics: NVS 4200M/PCIe/SSE2 / NVS 4200M/PCIe/SSE2

after running below:

sudo ubuntu-drivers autoinstall

reboot the system

all good, HDMI is connecting to my HDTV