Jtdcftul

I installed Ubuntu 18.04 from a bootable USB last night, but when I tried to login to the operating system I got stuck at a ubuntu loading screen with five dots on it.

I have seen an older question where it might seem to be a graphics problem, and the solution mentioned was to press Ctrl +Alt+f1,f2,f3 etc. to go the shell, but when I do that the shell is not showing up.

What else can I try?

Ubuntu 18.04 uses Wayland display server which does not work on a few systems.

Try the below steps to make the system boot normally:

1. Go to recovery mode from the GRUB menu and then boot into the system. Recovery mode uses low graphics and hence will not get stuck at the splash (logo) screen.


2. Once you are logged in, open a terminal (Use Ctrl+Alt+t shortcut)


3. 
   

   Try changing the display server to Xorg in the gdm3 custom conf file using the below command and reboot the system.

   
   
   

   sudo gedit /etc/gdm3/custom.conf
   
   

   
   



4. Change #WaylandEnable=false to WaylandEnable=false (Basically uncommenting it).




5. Reboot the system.

This will disable the Wayland display server and make the system to use the Xorg
display server. Your system should hopefully progress to the login screen now with a normal boot.

Let me know if this works.

Reference: https://linuxconfig.org/how-to-disable-wayland-and-enable-xorg-display-server-on-ubuntu-18-04-bionic-beaver-linux

The similar stuck issue occurs when I try to restart or shutdown the system after a new installation of ubuntu 18.04.2 on my laptop.

I solved the problem by switch from Nouveau driver to Nvidia driver, using Software & Updates App, as following screenshot. The problem disappers after using Nvidia driver, so I assume there are some potential bugs in Nouveau driver.

Just for references, here is my video card info:

$ ubuntu-drivers devices

== /sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.0 ==

modalias : pci:v000010DEd00001D12sv00001D72sd00001604bc03sc02i00

vendor   : NVIDIA Corporation

driver   : nvidia-driver-390 - distro non-free recommended

driver   : xserver-xorg-video-nouveau - distro free builtin

$ sudo lshw -c video

# OR

$ sudo lshw -c display

  *-display                 

       description: VGA compatible controller

       product: HD Graphics 620

       vendor: Intel Corporation

       physical id: 2

       bus info: pci@0000:00:02.0

       version: 02

       width: 64 bits

       clock: 33MHz

       capabilities: pciexpress msi pm vga_controller bus_master cap_list rom

       configuration: driver=i915 latency=0

       resources: irq:128 memory:b2000000-b2ffffff memory:c0000000-cfffffff ioport:4000(size=64) memory:c0000-dffff

  *-display

       description: 3D controller

       product: GP108M [GeForce MX150]

       vendor: NVIDIA Corporation

       physical id: 0

       bus info: pci@0000:01:00.0

       version: a1

       width: 64 bits

       clock: 33MHz

       capabilities: pm msi pciexpress bus_master cap_list

       configuration: driver=nvidia latency=0

       resources: irq:133 memory:b3000000-b3ffffff memory:a0000000-afffffff memory:b0000000-b1ffffff ioport:3000(size=128)