When I start see this massege I want start normal with out this black screen [duplicate]

I have had this problem occur a few times, and every time it was ODDLY Nvidia's fault - yes COUNTER-INTUITIVELY

If in Ubuntu after a long painful reboot run:

sudo apt-get purge nvidia*

or if locked try Ubuntu's awesome way of troubleshooting and try: Ctrl+Alt+F1 through F7 to get to "TTY1-7" and run the same thing. Reboot for good measure, and re-install Nvidia's Proprietary Drivers.

I hope I helped, Mark

I experienced the same problem; though Mark's (top answer) solution didn't immediately work (since ctrl+alt+F2 etc. brings up a flickering TTYL which is nearly impossible to use), his suggested cause was correct, as it was a problem with the nvidia driver.

Also for beginners like me, here's the fool-proof step-by-step solution:

1. Boot into safe mode (recovery mode). Enter this mode by holding the left shift key when the computer starts.

2. in terminal, type:

   sudo apt-get purge nvidia*

   sudo ubuntu-drivers autoinstall #Make sure you have internet connection

Other solutions suggested elsewhere didn't work (e.g. installing boot-repair or sudo apt-get update)

(This worked on my dual booted computer (Windows 10 and Ubuntu 18.04)

my error message was /dev/nvme0n1p5: clean, nnn/nnn files, nnn/nnn blocks

ctrl+alt+f2 or f3

• login with your account
• type sudo apt-get update (enter password when prompted)
• type sudo apt-get install xserver-xorg-video-intel
• reboot

I solved this by fixing the installation of my display manager (gdm3)

sudo apt install gdm3

Story behind :

I was upgrading from ubuntu 18 to 20. I have dual OS installed (Ubuntu 20 and Windows 10) on my Laptop Xiaomi, no nvida or amd graphic driver card, mine is Intel Core i5 8th gen. in my case, i solved it by fixing the display manager package (gdm3) the steps are :

1. Login to your terminal

you can do this via reboot and choose recovery mode or press [alt+f2] or [ctrl+alt+f2] when the screen is stuck

2. connect to network

You can do this using iwconfig <your-wifi-adapter> essid <network-name> key <network-password>

3. do basic recovery steps

sudo apt update
sudo apt clean
sudo apt autoremove
sudo apt update && sudo apt upgrade
sudo dpkg --configure -a
sudo apt install -f

at this point, it should do the trick, but just to make sure, cont. to the next step.

4. Check display manager

• $ cat /etc/X11/default-display-manager

/usr/sbin/gdm3

• systemctl status display-manager or /etc/init.d/gdm3 status make sure your display manager's status is active

then sudo dpkg-reconfigure gdm3 if it shows

/usr/sbin/dpkg-reconfigure: gconf2 is broken or not fully installed

then there is your problem. Fix the broken package : sudo apt install gdm3