KDE Plasma 5.12 LTS
The reason is that at 5:30 p.m., the lock screen picture was changed. Later, I thought that the hard disk space was not large and the solid background was deleted
I found that there was a problem when I set the picture. Some items were not displayed. I thought they would not be broken. As a result, the screen was locked and the screen was black
At that time, I didn’t know that I could cut the command line and force a reboot,
It’s good that the solid state didn’t collapse
But the subject fell apart,
Kubuntu shows error at login (file:///usr/share/sddm//themes/breeze/Main.qml:No such file or directory)
Press shift or ESC to enter the repair mode when entering the system. The result is useless
A lot of information has been found, and many schemes are not workable. Finally, I find this foreign article and feel the same problem.
How to Install the KDE Plasma Desktop on Ubuntu 18.04 LTS
No, not even here
Finally, I found this article at 11:00 p.m. and realized it through my own thinking:
Had the exact same issue after uninstalling some basic programs through the UI. Fixed it with apt-get install sddm-theme-breeze apt-get install --reinstall plasma-desktop The first install made it possible to log on again and the second one fixed the rest. You may use a virtual terminal to login (by pressing ctrl+alt+F1; if that doesn't work, try the other virtual terminals from ctrl+alt+F2 up to ctrl+alt+F6).
But this error will be reported in any execution
Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
Finally, think about whether the command line has no network,
If it doesn’t work, find a cable, connect it and Ping it
In accordance with the above
apt-get install sddm-theme-breeze apt-get install --reinstall plasma-desktop
It’s done. The method is very simple. The command is very simple. But you don’t know how hard it is. Record it. Hope to help you