Login Manager stopped working

English Install/Boot/Login
1

Hello!

After I restarted my computer Linux boots to the terminal instead of the login manager. Attempting to start KDE with the startkde command results in the error “$DISPLAY is not set or cannot connect to the X server”. Logging in as root and starting icewm with “startx” works, also KDE can be started as root with “startx /usr/bin/startkde”.

I have Nvidia GTX 650 videocard, proprietary drivers installed.

2

That’s normal.
You cannot run “startkde” in text mode, it needs a graphical environment.

Logging in as root and starting icewm with “startx” works, also KDE can be started as root with “startx /usr/bin/startkde”.

Ok, then it seems to be rather a problem with the login manager.
Which one are you using?
Does “systemctl restart display-manager” start the login manager?

What does “systemctl status display-manager” say when the system boots to text mode?
And “systemctl get-default”?

Btw, you should get startx to work as user if you set Xorg suid-root:

sudo chmod +s /usr/bin/Xorg

May be helpful to know if startx can successfully start a KDE session as user.

Or switch to xdm, that should still work.
For this, set DISPLAYMANAGER=“xdm” in /etc/sysconfig/displaymanager.

I have Nvidia GTX 650 videocard, proprietary drivers installed.

Please post /var/log/Xorg.0.log, and the output of “glxinfo | grep render” (preferably as user, and you probably need to install Mesa-demo-x first).

3

Thank you for your reply!

I’m using kdm, and “systemctl restart display-manager” does indeed start login manager.

systemctl status display-manager:

● display-manager.service - X Display Manager   Loaded: loaded (/usr/lib/systemd/system/display-manager.service; disabled; vendor preset: enabled)
   Active: active (running) since Fri 2016-10-14 01:25:57 +05; 13min ago
  Process: 1745 ExecStart=/usr/lib/X11/display-manager start (code=exited, status=0/SUCCESS)
 Main PID: 1766 (kdm)
    Tasks: 1 (limit: 512)
   CGroup: /system.slice/display-manager.service
           └─1766 /usr/bin/kdm

systemctl get-default:

multi-user.target

It does now!

Here is glxinfo:

direct rendering: YesOpenGL renderer string: GeForce GTX 650/PCIe/SSE2
    GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth, 
    GL_KTX_buffer_region, GL_NVX_conditional_render, GL_NVX_gpu_memory_info, 
    GL_NV_compute_program5, GL_NV_conditional_render, 
    GL_NV_path_rendering, GL_NV_pixel_data_range, GL_NV_point_sprite, 
    GL_ARB_compute_variable_group_size, GL_ARB_conditional_render_inverted, 
    GL_KTX_buffer_region, GL_NVX_conditional_render, GL_NVX_gpu_memory_info, 
    GL_NV_compute_program5, GL_NV_conditional_render, 
    GL_NV_path_rendering, GL_NV_pixel_data_range, GL_NV_point_sprite, 
    GL_EXT_primitive_bounding_box, GL_EXT_render_snorm, GL_EXT_robustness, 
    GL_NV_conditional_render, GL_NV_copy_buffer, GL_NV_copy_image, 
    GL_NV_packed_float_linear, GL_NV_path_rendering, 
    GL_OES_fbo_render_mipmap, GL_OES_geometry_point_size,

Xorg log appers to be too long to post ¯_(ツ)_/¯ I can probably upload it somewhere if it’s essential.

4

Your system is set to boot to text mode for some reason.
Run “sudo systemctl set-default graphical.target”, or change the default target in YaST->System->Services Manager.

Xorg log appers to be too long to post ¯_(ツ)_/¯ I can probably upload it somewhere if it’s essential.

Not necessary any more.
There’s nothing wrong with Xorg or the login manager.
It just isn’t being started at boot.

5

Well, that did it. Thank you for your help, much appreciated!