Upgraded 16.04 (Xenial Xerus) release to 18.04 (Bionic Beaver) - Post installation machine booted without GUI under multi-user target!!! Solution below -
- Installation: Ubuntu 16.04 (Xenial Xerus)
- Upgraded release: Ubuntu 18.04 (Bionic Beaver)
- No GUI after upgrade machine drops to CLI
- Tried to start X
- Using command: $ startx
- This worked (Not permanent solution)
- Tried to configure lightdm and gdm
- Using command: $ sudo dpkg-reconfigure gdm, $ sudo dpkg-reconfigure lightdm
- Found that 'gdm' and 'lightdm' was not installed post upgrade and thus CLI was being shown on every boot
- Installed gdm
- Using command: $ sudo apt-get install gdm