Why do LDAP and NSCD with PAM-MOUNT break 16.04 xenial?

I have done many installs and always end up breaking the system. The steps I take are:

Fresh, clean install (have done both LVM and non-LVM, UEFI and EFI) on HDD with no other OSes in place
Reboot
Login
Update
Install aptitude
Install libpam-ldap & nscd
Configure LDAP
Configure nsswitch.conf
    passwd: ldap compat
    group: ldap compat
    shadow: ldap compat
Edit /etc/pam.d/common-session
    add this as second to last line: session required pam_mkhomedir.so skel=/etc/skel umask=0022
sudo /etc/init.d/nscd restart
Test LDAP with su (can su and home folder is created)
Reboot

FFFFFFFFFFFFFFffffffffffffffffff

No joy. Black screen. X11 cannot find display. Offer to run in low graphics mode.

This is my system on fresh install before ldap config:

    lspci http://pastebin.com/9znwktDu
    dmesg http://pastebin.com/QQXYiYVj
    syslog http://pastebin.com/9yB6WJfh

This is syslog after

    syslog http://pastebin.com/Kd92EpsA