Created attachment 801737 [details]
.tgz of journals from current & 2 previous boots 15.0 host gb250

> inxi -b
System:    Host: gb250 Kernel: 4.12.14-lp150.12.48-default x86_64 bits: 64
Desktop: Trinity Distro: openSUSE Leap 15.0
Machine:   Type: Desktop System: Gigabyte product: B250M-D3H v: N/A serial: N/A
           Mobo: Gigabyte model: B250M-D3H-CF v: x.x serial: N/A UEFI: American
Megatrends v: F9 date: 04/10/2018
CPU:       Dual Core: Intel Core i3-7100T type: MT MCP speed: 800 MHz min/max:
800/3400 MHz
Graphics:  Device-1: Intel HD Graphics 630 driver [8086:5912]: i915 v: kernel
           Display: server: X.org 1.19.6 driver: modesetting unloaded:
fbdev,vesa tty: 189x52
           Message: Advanced graphics data unavailable for root.
Network:   Device-1: Intel Ethernet I219-V driver: e1000e
Drives:    Local Storage: total: 2.05 TiB used: 28.49 GiB (1.4%)
Info:      Processes: 187 Uptime: N/A Memory: 15.55 GiB used: 319.1 MiB (2.0%)
Shell: bash inxi: 3.0.30

Sequence of events:
Last updated 2019-02-13 (all OK)
zypper up (2019-03-31) (in multi-user.target)
restart (to graphical.target)

Actual behavior:
1-XDM paints
2-no mouse response
3-no keyboard response, not even NUM
4-remote login succeeds

Expected behavior:
everything works as expected

FWIW, the zypper up inexplicably changed /etc/alternatives/ thus:
default-displaymanager -> /usr/lib/X11/displaymanagers/tdm
default-xsession.desktop -> /usr/share/xsessions/tde.desktop
to
default-displaymanager -> /usr/lib/X11/displaymanagers/xdm
default-xsession.desktop -> /usr/share/xsessions/icewm-session.desktop