Ubuntu 19.04 is stuck at the ubuntu logo on the boot sequence. I installed it on a Dell Latitude E6540 as the main operating system (not in VirtualBox). It worked normally for few days, and since last night the computer never boots up and gets stuck at this screen.
Please help to recover it.
Hold shift while booting up if grub menu doesn't appear automatically, once you're in the grub menu, press E while you are selecting Ubuntu. Add nomodeset after quiet splash in the line which starts with linux. This will disable the graphic drivers which I believe is the problem here. Once you boot up, in order to permanently change your grub options, open a terminal and write:
sudo leafpad /etc/default/grub
Change leafpad for whatever text editor you use, might be gedit!
Search for the line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
Change it to: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"
Head to a terminal and type sudo update-grub
As your question is not a 100% clear and I don't know if you have a dedicated GPU, I believe this is a graphic driver error, so my solution relies on disabling them. However you could just enter Ubuntu using the solution given, then instead of editing grub, simply install your proprietary drivers.
