kwin broken in 15.10?

[Dale Trombley]

Just updated my 15.10 today, autologin went straight to black screen. X is
running, kwin is running but seems to not be able to display anything.

restarted and command line removed my autologin. got to login screen and
selected failsafe.

failsafe login restarts kwin and put's me back to login screen.

login in with plasma session gives the black screen with large X mouse icon.

any suggestions?

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