Software & AppsOperating SystemLinux

How To Fix Black Screen on Startup in Ubuntu 20.04

Ubuntu 20

Encountering a black screen on startup can be a frustrating experience, especially when you’re not sure what the underlying issue is. This guide will provide you with a step-by-step process on how to fix the black screen on startup in Ubuntu 20.04.

Update and Upgrade Your System

Before you dive into more complex solutions, it’s always a good idea to ensure your system is up-to-date. Run the following commands in the terminal:

sudo apt-get update
sudo apt-get upgrade
sudo apt-get autoremove

The sudo apt-get update command fetches the list of available updates, sudo apt-get upgrade actually installs the new versions of the packages, and sudo apt-get autoremove removes any unnecessary packages that were automatically installed to satisfy dependencies for some package and that are no more needed.

Check the GRUB Bootloader

The GRUB2 bootloader could be a potential source of the problem. To access it, reboot your computer while holding the Shift key. If you see the GRUB boot menu, select the “Ubuntu (recovery mode)” option and follow the instructions.

If the GRUB boot menu doesn’t appear, you can use a Ubuntu live CD or USB to install and launch Boot Repair. This will scan your system for any problems with the bootloader. Choose the recommended repair option and restart your computer.

Reinstall Ubuntu While Keeping Files and Programs

If the problem persists, you might consider reinstalling Ubuntu. This could solve the issue if it was caused by a problem with the initial installation. Here’s how to do it:

sudo apt update
gnome-software
sudo apt install --reinstall ubuntu-software

The sudo apt update command updates the list of available packages. The gnome-software command opens the GNOME software center, and the sudo apt install --reinstall ubuntu-software command reinstalls the Ubuntu software.

Change Display Manager

In some cases, switching from the lightdm display manager to the gdm3 display manager can fix the black screen issue. Use the following command to make the change:

sudo dpkg-reconfigure lightdm

Follow the prompts to switch to the gdm3 display manager.

Check BIOS Settings

Lastly, check your BIOS settings. Make sure that the boot mode is set to UEFI instead of legacy. Also, disable the secure boot option if it is enabled. These settings can vary depending on your computer’s manufacturer, so refer to your computer’s manual or manufacturer’s website for specific instructions.

Conclusion

Fixing a black screen on startup in Ubuntu 20.04 can be a complex process, as the issue can stem from various factors. However, by following these steps, you should be able to diagnose and resolve the problem. If none of these solutions work, it is recommended to seek further assistance or consult relevant forums for more specific troubleshooting steps. Remember, it’s always a good idea to back up your data regularly to prevent any potential loss.

How can I check if my system is up-to-date?

To check if your system is up-to-date, you can run the following command in the terminal:

sudo apt-get update

This command will fetch the list of available updates for your system.

What should I do if the GRUB boot menu doesn’t appear?

If the GRUB boot menu doesn’t appear, you can use a Ubuntu live CD or USB to install and launch Boot Repair. Boot Repair is a tool that can fix common bootloader issues. You can find instructions on how to use Boot Repair on the official Ubuntu documentation website.

Will reinstalling Ubuntu delete my files and programs?

Reinstalling Ubuntu using the steps mentioned in the guide will not delete your files and programs. However, it’s always a good idea to backup your important data before performing any major changes to your system, just to be safe.

How can I switch from lightdm to gdm3 display manager?

To switch from lightdm to gdm3 display manager, you can use the following command in the terminal:

sudo dpkg-reconfigure lightdm

This command will prompt you to select the display manager you want to use. Choose gdm3 and follow the instructions.

How can I access my BIOS settings?

To access your BIOS settings, restart your computer and look for a key combination or a specific key to press during the startup process. Common keys to access the BIOS settings are F2, Del, or Esc. The specific key varies depending on your computer’s manufacturer. Refer to your computer’s manual or manufacturer’s website for the exact key or key combination to access the BIOS settings.

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