After upgrading my Ubuntu desktop from 17.10 to 18.04, everything went smooth until I restarted my PC.
The first suspicious thing I noticed was that it has the same grub with 17.10 - it selected the old grub from the menu (auto-select) and then showed me the boot screen. But afterwards instead of GUI I got terminal access (tty1) only.
How can I fix that? I tried running:
sudo update-grub
but with no luck and the initial grub is still the same. How can I fix this problem?
I experienced the same problem and solved it by installing ubuntu desktop using this commandsudo apt-get update
then sudo apt-get install ubuntu-desktop
N.B Your computer should be connected to the internet, for my case just plugged in an internet cable and used the commands above