This is my X log when trying to start on PI3.
X.Org X Server 1.17.2 Release Date: 2015-06-16 [ 683.913] X Protocol Version 11, Revision 0 [ 683.921] Build Operating System: 4.5.7-fedora-4 [ 683.930] Current Operating System: Linux centos-rpi3 4.4.33-v7.1.el7 #1 SMP Mon Nov 21 18:48:06 UTC 2016 armv7l [ 683.930] Kernel command line: 8250.nr_uarts=0 dma.dmachans=0x7f35 bcm2708_fb.fbwidth=1776 bcm2708_fb.fbheight=952 bcm2709.boardrev=0xa02082 bcm2709.serial=0x1fcfe9a2 smsc95xx.macaddr=B8:27:EB:CF:E9:A2 bcm2708_fb.fbswap=1 bcm2709.uart_clock=480 00000 vc_mem.mem_base=0x3dc00000 vc_mem.mem_size=0x3f000000 dwc_otg.lpm_enable=0 console=ttyS0,115200 console=tty1 root=/dev/mmcblk0p3 rootfstype=ext4 elevator=deadline rootwait selinux=1 security=selinux enforcing=0 [ 683.969] Build Date: 09 November 2016 05:46:31PM [ 683.978] Build ID: xorg-x11-server 1.17.2-22.el7 [ 683.988] Current version of pixman: 0.34.0 [ 684.007] Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. [ 684.007] Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. [ 684.045] (==) Log file: "/var/log/Xorg.0.log", Time: Mon Feb 13 13:36:06 2017 [ 684.045] (II) Loader magic: 0x54cb3004 [ 684.045] (II) Module ABI versions: [ 684.045] X.Org ANSI C Emulation: 0.4 [ 684.045] X.Org Video Driver: 19.0 [ 684.045] X.Org XInput driver : 21.0 [ 684.045] X.Org Server Extension : 9.0 [ 684.046] (II) no primary bus or device found [ 684.056] List of video drivers: [ 684.065] modesetting [ 684.065] (II) LoadModule: "modesetting" [ 684.066] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so [ 684.067] (II) Module modesetting: vendor="X.Org Foundation" [ 684.067] compiled for 1.17.2, module version = 1.17.2 [ 684.067] Module class: X.Org Video Driver [ 684.067] ABI class: X.Org Video Driver, version 19.0 [ 684.067] (WW) Falling back to old probe method for modesetting [ 684.076] No devices to configure. Configuration failed. [ 684.077] (EE) Server terminated with error (2). Closing log file.