title: Ubuntu 20.04 : HDMI output not working Nvidia GT 620M
body: <p>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.</p>
  
  <pre><code>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
  </code></pre>
  
  <p>There are two missing dependencies : xserver-xorg-video-nvidia-390  and  ibnvidia-cfg1-390</p>