Btw, you can turn off kwalletmanager. But there are two versions, the KDE4 and the KF5 one.
You’d need to disable the KDE4 one in KDE4’s settings…
Although the KDE4 version should only be started if you actually use KDE4 applications (that use the wallet).
I noticed that were removed other important packages, but I thought the Yast knew what he was doing and would certainly reinstall these important programs, perhaps because he removed his interaction with kWalletmanager.
YaST does know what he’s doing.
Plasma5 (the KDE requires kwalletmanager5, so YaST removed Plasma5 as well after asking you.
But when restarting the PC graphical KDE screen has been replaced by another, I can not remember his name (perhaps something like ICE)
That’s likely IceWM, yes, which is used as fallback if the wanted desktop session is not available.
I again installed the Leap, keeping intact home folder, but KDE screen did not return.
A fresh installation?
Then KDE/Plasma5 should be installed.
Make sure you have plasma5-session though.
How do I return to use KDE?
Maybe you just have to choose it at the login screen…
How do I do for kwalletmanager not bother me anymore, even after disconnecting it?
Actually it is not kwalletmanager that “bothers” you, but kwalletd.
You can set an empty password for the wallet to not having to enter a password.
Or you can disable it in systemsettings/systemsettings5. (systemsettings is in the package kdebase4-workspace-addons, which is not installed by default)
But then you’ll have to e.g. enter your WiFi password every time you want to connect (unless you configure to store it system-wide).