View source for Black Screen

Troubleshooting guide:
== '''My computer boots to a Black screen''' ==

Please keep in mind that this page is just an experiment to collect the working solutions to common problems from hundreds of forum posts to a wiki-like troubleshooting page. It assumes you are running KDE Neon or another Debian based distribution.
It needs to be checked by experienced users.

=== Has something crashed when you turned off your PC? ===  
Have you recently updated?

Blumen wrote on Reddit:  
If you can see your cursor, but there is no wallpaper and panel, this means the process  
plasmashell crashed. Try running:  
    plasmashell --replace ; kwin_x11 --replace  

tinny123 wrote:  
===== Do you have offline updates turned off? ===== 
Then it's possible you didn't let discover finish installing updates so you have now broken packages.  
When you get to the black screen hit    ctrl+alt+f1    and log in into terminal with your username and password.  
It would be good if you can connect your pc to the internet.  

In terminal run these commands:
    sudo apt update  

    sudo apt dist-upgrade  

    sudo apt install -f   

===== Do you have python modules installed? =====
You can try fixing update errors with already existing python modules: remove the old version from the system installation with  
    sudo pip uninstall python-<the module to uninstall>

===== Have you installed kernel updates lately? ===== 
You can try booting with a different kernel from the GRUB menu (Advanced options for GNU/Linux).  

=== If you can't see your mouse: ===

You can try hitting ctrl+alt+f2 to a terminal then running:
    startx

It's possible that your home directory is so full it stops the GUI from loading. You can try booting from a live-USB and cleaning up some space.  
If you can't boot from a live-USB it's likely you have a hardware problem with your PC.