Kubuntu 18.04 default theme breeze dark plasma theme repair Journal


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

Kubuntu 18.04 default theme breeze dark plasma theme repair Journal

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,

ping 163.com

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