[CentOS] C7: screensaver locks screen

Strange thing just began happening this past weekend with my Centos-7
netbook (using the MATE desktop, which may mean it's an EPEL problem...).

the lock screen checkbox in the screensaver's UI is NOT checked.

I've even used the dconf editor to uncheck ALL the boxes in the
screensaver section that relate to locking the screen.

nada. no such luck.

even after rebooting, it still locks the screen.

I'm open to further suggestions, thanks in advance!

Fred

-- 
---- Fred Smith -- fredex at fcshome.stoneham.ma.us ----------------------------
                    Do you not know? Have you not heard? 
    The LORD is the everlasting God, the Creator of the ends of the earth. 
  He will not grow tired or weary, and his understanding no one can fathom.
----------------------------- Isaiah 40:28 (niv) -----------------------------