Try this and see if it helps:
1. Install xf86-video-fbdev from /extra. Don't know why but this seems to calm things down a bit with configurations.
2. Login as root
If it passes proceed to step 4.
3. IF the configuration fails check the /root directory for xorg.conf.new and edit the file outside of X11 using vim, vi, nano, or another editor to REMOVE all the output screens and video devices but Screen 0 and Video Device 0. This is your primary screen and video card output.
Make sure that video device 0's driver is set to "intel" and not modesetting, fbdev, or vesa
. You may also want to add this to the DRI section of xorg.conf:
cp -v xorg.conf.new /etc/X11/xorg.conf
4. Run startx as Root and see if the configuration works, then check the user accounts as well.
X11 can be ran without an xorg.conf file, but any specialty settings that are required by the device CAN NOT be saved or enabled if you do not have an appropriate xorg.conf file.