I'm not sure if this is the best community to post in, but I just bought a used computer and slotted in an RX480 as the GPU. I installed KDE Neon 5.27 on it, and it worked flawlessly for 2 days.
Then, even though it was working earlier today, it slept and then would not wake up. So I turned off the power and turned it back on again, and was greeted with this error screen:
The only prior error message I'd gotten from the system was when I tried to install wine for one application, it told me some packages weren't up to date, without a way to fix it. I can enter the BIOS just fine.
What is going on? How do I fix this?
How do I get into emergency mode?
The Shell where you typed "systemctl reboot" and "exit".
If you are running KDE neon, try "apt update" and "apt upgrade". If It doesn't work do "sudo apt update" and "sudo apt upgrade"
I ran apt update and some index files failed to download. It was just a warning though.
But systemctl reboot and exit still fail the same way.
Before the "systemctl" command: try removing the GPU and booting it up without the GPU If it works, you can skip the "systemctl" commands