Hi

On a old machine (thinkpad X200s) I installed Ubuntu 16.04 (64bit) as in
the machine (Thinkpad X1) I am using for writing this message.

While I installed trinity on the X1
via 

deb http://mirror.ppa.trinitydesktop.org/trinity/deb/trinity-sb xenial deps-r14 main-r14
deb-src http://mirror.ppa.trinitydesktop.org/trinity/deb/trinity-sb xenial deps-r14 main-r14

For the old X200s machine I chose 

deb http://mirror.ppa.trinitydesktop.org/trinity/deb/trinity-r14.0.x               xenial  main
deb http://mirror.ppa.trinitydesktop.org/trinity/deb/trinity-builddeps-r14.0.x    xenial  main
deb-src http://mirror.ppa.trinitydesktop.org/trinity/deb/trinity-r14.0.x           xenial  main
deb-src http://mirror.ppa.trinitydesktop.org/trinity/deb/trinity-builddeps-r14.0.x xenial  main


Be it as it may, everything was fine on the X200s till I run 

sudo  dpkg-reconfigure tdm-trinity

To use tdm-trinity instead of lightdm

Now when I try to reboot the machine never shows a login but is in the
infinite loop. Any idea what I could do (other than reinstalling the
whole beast)

thanks