http://bugs.gentoo.org/290034

--- configs/wdm-config.in
+++ configs/wdm-config.in
@@ -21,6 +21,7 @@
 DisplayManager*session:         @DMDIR@/Xsession
 DisplayManager*authComplain:    false
 DisplayManager*wdmLogin:        @exec_prefix@/bin/wdmLogin
+DisplayManager*terminateServer: true
 !
 ! display screen background--if not set or set to none, then the
 !                            background is not set by wdm.