Reactivation of the login dialogue for a desktop session

I updated some software components (including X server packages) again.
Now I see undesirable software behaviour by the login procedure for another graphical desktop session.

I can move a mouse pointer around on the screen. But the login dialogue is not presented by the selected display manager (like lightdm, sddm or xdm) while the background is still black during my start attempt.

I am curious on your advices for fixing another strange software situation.

You can use
twice to crash the X-session, which should then restart. Maybe you get a working login after that. At least it is worth trying.

This might be a graphic driver issue. Are you using Nvidia graphics?


The software “” gave me the feedback yesterday that the corresponding installation succeeded.

Are there any other approaches to consider for the desired error analysis?

My way of avoiding these problems, is to stick to Intel graphics. I did have a box with nvidia graphics, and it was frustrating, particularly with Tumbleweed. I eventually stopped using Tumbleweed on that box. And I did not shed any tears when it finally died.

The device vendor selection influences solution approaches considerably.

How can the display of a moving mouse pointer succeed while the other graphic content is missing in my openSUSE software configuration at the moment?

Does this issue exist for a freshly created new user?

What NVIDIA chip/card??

Try removing the driver then reinstalling Be sure your card is supported by the driver you install.

If a note book remove driver and follow bumblebee instruction.

I find that the user list should not matter when an user identification can not be selected at all because of a broken login GUI display.

Which display manager were you using? Can you get to a working VT? Try changing DM (eg lightdm) with

update-alternatives --config default-displaymanager

select the required, then reboot. Does that result in a working login screen?

Sorry, missed that.
Does running another

zypper dup

do anything ?

I tried to switch between lightdm, sddm and xdm by the YaST system configuration editor.

Can you get to a working VT?

Text terminal interfaces are still working as expected.

Does that result in a working login screen?

No, not yet in my current software situation.

No, it needs to be done using ‘update-alternatives’ now.

That does not work, has been deprecated. Instead:

su -
update-alternatives --config default-displaymanager

I can hope that another update will fix the involved software dependencies in desirable ways in the near future.

Sonne:~ # update-alternatives --display default-displaymanager
default-displaymanager - auto mode
  link best version is /usr/lib/X11/displaymanagers/gdm
  link currently points to /usr/lib/X11/displaymanagers/gdm
  link default-displaymanager is /usr/lib/X11/displaymanagers/default-displaymanager
/usr/lib/X11/displaymanagers/console - priority 5
/usr/lib/X11/displaymanagers/gdm - priority 25
/usr/lib/X11/displaymanagers/kdm - priority 15
/usr/lib/X11/displaymanagers/lightdm - priority 15
/usr/lib/X11/displaymanagers/sddm - priority 25
/usr/lib/X11/displaymanagers/xdm - priority 10

Does that result in a working login screen?

It depends on the selection.

  • Yes. - The graphical login presentation is acceptable for lightdm and xdm.
  • No. - Only different mouse pointers are shown by gdm, kdm and sddm at the moment.

Then, use LightDM. Or xdm.

I would suggest “lightdm”, because I don’t think “xdm” allows you to choose anything other than the default desktop environment.

Same here, (as I already hinted a few posts back).

I switched to this display manager again based on the correct system configuration command successfully.

I stumble on the next software surprise. - All graphical display managers are not working in the expected way for my openSUSE desktop session at the moment.
Would you like to help any more in finding out which software components hinder the presentation of the usual graphical login interfaces here?