[CentOS] updates from last Saturday

I yum updated last Saturday.  It had a new kernel.  I hadn't rebooted but saw that firefox update today and did that then rebooted.  My system wouldn't boot all the way with the new kernel.  I went back to 3.10.0-229.7.2.el7.x86_64 and my system would boot.  When I boot with the 3.10.0-229.11.x kernel.  I noticed some gnome manager stuff.  I thought I had the kde desktop installed for CentOS 7.1.

wes