Picky Picky lxde - dnschneid/crouton GitHub Wiki
So, this page will cover 2 annoying issues with lxde. the first one is the lxsession: cannot open display. the second one is the pid bug ( you can just click ok and get on with your day)
now then, for the first bug, this work around is really simple.
Just enter-chroot as usual, and once in, just run the following line of code:
exec xinit /usr/bin/startlxde
It's... that simple.