After upgrading to 22.04 screen stays at a black screen when logging in

I'm using a Lenovo ThinkPad P15s. I recently upgraded Ubuntu to 22.04, but after rebooting I can't seem to log in to my account, and the screen stays blank. I performed a system restore and was able to log in, but after rebooting I encountered the same problem. I assume that this update may contain some bugs. Is there an easy way to fix this issue?

Walrus4786 was able to solve the issue with this tutorial as shown below.

After upgrading a computer from Ubuntu 16.04 to Ubuntu 18.04 or Ubuntu 18.04 to Ubuntu 20.04, during boot the screen goes blank (turns black), all hard disk activity halts, and the system becomes frozen. This event can also occur on a fresh installation or when updates are installed.

This is due to a video mode issue that causes the system to halt or freeze.

Temporary fix

To get the system to boot:

1. After turning on your PC, hold the right Shift key to get to the GRUB bootloader if your computer uses a BIOS. If your computer uses EFI or UEFI, continuously tap the Esc key after turning on your PC.

2. Once GRUB is open, press the “e” key to edit the first highlighted entry “Ubuntu”.

3. Move your cursor down to the line that starts with linux, and use the right arrow key to find the section with the words ro quiet splash.

4. Add nomodeset after these words.

5. Feel free to remove quiet and splash for more verbosity to troubleshoot the boot process.

6. Press either Ctrl + X or F10 to boot.

7. The system should now boot.

Permanent fix

To permanently resolve the issue:

1. Once the system has booted using the temporary fix, log in.

2. Open a terminal window (Dash -> Terminal, or press Ctrl + Alt + T).

3. Either su in to root, or use sudo to open your favorite text editor and edit the file /etc/default/grub (I use nano which can be installed by running sudo apt install nano):

   nano /etc/default/grub
   

4. Locate the line with the variable GRUB_CMDLINE_LINUX_DEFAULT, and add nomodeset to the variables. Feel free to remove splash and quiet if you'd like text boot. Here's an example of my line after editing (yours will look different):

   GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"
   

5. Save the file and exit the text editor (Ctrl+X to quit, then press y and Enter to save).

6. At the bash prompt, execute the following command to regenerate the grub.conf file on the /boot partition from your new default file:

   update-grub
   

7. Restart your system. It should now boot!