Issues with several applications after a system update

After my last system update, launching any one of several applications (chromium, steam, etc) causes the desktop to crash and brings me back to the login screen. This happens with all desktop environments I’ve tried. Does anyone have any suggestions? Some of these applications were open during the update, so I’m not sure if that’s related or not.
Thanks.

I notice these in the logs:

Errors from xkbcomp are not fatal to the X server
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Compat map for group 2 redefined
> Using new definition
> Warning: Compat map for group 3 redefined
> Using new definition
> Warning: Compat map for group 4 redefined
> Using new definition
Errors from xkbcomp are not fatal to the X server
(EE)
(EE) Backtrace:
(EE) 0: /usr/bin/Xorg (xorg_backtrace+0x3d) [0x585abd]
(EE) 1: /usr/bin/Xorg (0x400000+0x189829) [0x589829]
(EE) 2: /lib64/libpthread.so.0 (0x7f4e7dabf000+0xf9f0) [0x7f4e7dace9f0]
(EE)
(EE) Segmentation fault at address 0x0
(EE)
Fatal server error:
(EE) Caught signal 11 (Segmentation fault). Server aborting
(EE)
(EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
(EE) Please also check the log file at “/var/log/Xorg.0.log” for additional information.
(EE)
(EE) Server terminated with error (1). Closing log file.

Loading extension GLX
Loading extension NV-GLX
Loading extension NV-CONTROL
Loading extension XINERAMA
klauncher(13990) kdemain: No DBUS session-bus found. Check if you have started the DBUS server.
kdeinit4: Communication error with launcher. Exiting!
kdmgreet(13984)/kdecore (KTimeZone): KSystemTimeZones: ktimezoned initialize() D-Bus call failed: “Not connected to D-Bus server”

Reinstalling my nvidia drivers seems to have resolved the problem.

Nice you solved it yourself (that is allways good for your confidence).

But please next time that you come here with a question/problem, always tell which version of openSUSE you use, Else even saying that you did a “last system uopdate” isn’t telling much.