[SOLVED] Problem with LXDE desktop environment on Ubuntu 12.10

LXDE worked fine on 12.04. Now I installed it on 12.10, but when booting the computer does not present me with any other options than Unity, no matter what. Something needs to be done, but what? Any hint, anyone?

Running LXDE on U12.10 here (original install was Xubuntu, but I deleted all of the XFCE components) without problems. I'm using lxdm as my display manager; it offers me the expected choices of sessions. Your display manager should offer a choise of sessions - do you have lxsession installed?

Yes
I tried to install lxde-common, lxsession and desktop-file-utils, but all I get is that the newest versions are already installed, so I`m back to square 1. Something else is the matter...

Below is my U-12.10 lxdm.conf. I don't have to worry about the default session, so I left that line commented out.

/etc/lxdm$ cat lxdm.conf 
[base]
## uncomment and set autologin username to enable autologin
# autologin=dgod

## uncomment and set timeout to enable timeout autologin,
## the value should >=5
# timeout=10

## default session or desktop used when no systemwide config
# session=/usr/bin/startlxde

## uncomment and set to set numlock on your keyboard
# numlock=0

## set this if you don't want to put xauth file at ~/.Xauthority
# xauth_path=/tmp

## greeter used to welcome the user
greeter=/usr/lib/lxdm/lxdm-greeter-gtk

[server]
## arg used to start xserver, not fully function
# arg=/usr/bin/X -background vt1

[display]
## gtk theme used by greeter
gtk_theme=Clearlooks

## background of the greeter
bg=/usr/share/backgrounds/default.png

## if show bottom pane
bottom_pane=1

## if show language select control
lang=1

## if show keyboard layout select control
keyboard=0

## the theme of greeter
theme=Industrial

[input]

[userlist]
## if disable the user list control at greeter
disable=1

## whitelist user
white=

## blacklist user
black=

Hello Rock Doctor
I compared my lxdm.conf to yours, and there is only a small difference, i.e.:

[userlist]
## if disable the user list control at greeter
disable=0

Has this disable=0 INSTEAD OF disable=1 any significance???

teboil12

i'd probably try using

sudo dpkg-reconfigure lxdm

Hi Guys!
Now I`ve really messed it up! I did as told, sudo dpkg-reconfigure lxdm. As a result, I am stuck with a desktop with the text "Login:" and after that I can choose "syslog" or "usbmux daemon,,,(usbmux)" or "saned" and under these there is still the option "More..."
At the bottom part of the screen I can choose between many kinds of desktops, among others this LXDM, but to no use.
When hitting enter I get the "Password: " and when giving my password and hitting enter I am back to "Password " again. I am getting nowhere and the panic is rising. Could anyone help me out from this? Feel really uncomfortable at the moment.

In lxdm.conf

## if disable the user list control at greeter
disable=1

will eliminate the list of all users (anything with a uid).

Looking at the first few lines of /etc/lxdm/Xsession on my system, I see

/etc/lxdm$ cat Xsession 
#!/bin/bash

# use bash for "exec -l", howto run login shell by /bin/sh ?

if [ $# -eq 1 -a -n "$1" ]; then
	LXSESSION=$1
else
# default session
	LXSESSION=/usr/bin/startlxde
fi

What happens if you add the line

LXSESSION=/usr/bin/startlxde

immediately following the last line shown above?

Hi again!
Sorry to have revealed to all the world what a moron I am. I studied the matter a little bit closer and found out that when I chose the option "More" I realised that my user name was asked for. Could not see it at first because it was black letters on a blue background. After entering my user name I was asked for my passwd and voilá, I was back in business again. This time I am free to choose whichever desktop I wish just like in the old Ubuntu 12.04 days! So thanks to goodtimetribe for the advice, looks like I am gonna manage from here on again.