I've got it! It has nothing to do with xf86-input-keyboard or xorg-server, but with startx. It nowadays starts X on the current tty due to an issue in systemd-logind (according to bugzilla.redhat.com/show_bug.cgi?id=806491). This causes xorg-server to enable keeptty and thus the trouble.
From my point of view the corresponding patch (cgit.freedesktop.org/xorg/app/xinit/commit/startx.cpp?id=44915d6953076849b69 a017f6fc8234b0f254362) should be considered a bug. To fix it properly, the xinit configure ought to have a enable-systemd-logind option with auto detection - just like xorg-server. Please fix it. Thanks to everyone for their help. Ingo _______________________________________________ xorg@lists.x.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.x.org/mailman/listinfo/xorg Your subscription address: %(user_address)s