Operating system shows black screen with error messages

Solution 1:

From the comments...

NVIDIA

Regarding Nvidia crashes...

  • reinstalled Ubuntu 20.04

  • reinstalled Nvidia 470 driver from Software & Updates Additional Drivers tab

  • rebooted, and it's working fine now

Update #1:

BIOS

Dell Latitude 3400

You have BIOS 1.18.1. BIOS 1.19.0 is available here.

Note: Have good backups before updating the BIOS

Note: Confirm that I have the correct web page for your model #