I’have installed opensuse LEAP 42.3 with KDE Desktop. Yesterday i change it with the GNOME one from Yast but coming back to the KDE i did some mistake. I select from DISPLAYMANAGER in the DIsplay Manager ‘‘kde’’ and from DEFAULT_WM ‘‘kde4’’. After that i rebot the system and i obtain a grey login window. If i insert correctly the user and the pasword the system reload the login window. How i can exit from this trouble?
There is no DISPLAYMANAGER called “kde”, so you get xdm as fallback.
If you did a default KDE installation, this should be “sddm”. “kdm” is still included so you can use that too, but you’d need to install it manually (unless this is an upgrade, then it likely may be installed already).
DEFAULT_WM should be set to “plasma5” or “kde-plasma”, but that actually doesn’t really matter much as you can choose the session on the login screen (and SDDM actually ignores that setting anyway).
And is kdm installed?
As I said, the default installed DM is sddm, kdm has been dropped upstream 3 years ago and is no longer developed.
The problem is that now I can not go any further the login menu. If can be usefull to help me i can load the screenshot of the login window.
A screenshot won’t help much, I do know how xdm looks like…
What’s the problem though?
Enter your username and password and press RETURN, and you should get logged in.
(although you’d probably end up in a simple twm session instead of Plasma, as DEFAULT_WM is wrong)
Note that you need to keep the mouse cursor over the text input field, otherwise it will lose the focus.
Or press Ctrl+Alt+F1 to switch to text mode, login there and make the changes, then reboot.