TX1 GUI not booting after reinstalling lightdm and ubuntu desktop

I keep getting the error:

Current version of pixman: 0.33.6
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==)Log file: "/var/log/Xorg.1.log" Time:..
(==)Using system config directory "/usr/share/X11/xorg.conf.d"
waiting for X server to shut down (II) Server terminated succesfully(0). Closing log file.

I remove lightdm and ubuntu desktop now cannot get the GUI back. This is what I followed:
https://devtalk.nvidia.com/default/topic/1010791/jetson-tx1/how-to-disable-tx1s-desktop-/
Any solutions

I haven’t tried actual removal, but does this show as all ok? If not, then the drivers may not be capable of display:

sha1sum -c /etc/nv_tegra_release