After upgrade to ubuntu 12.10 cannot selected any other desktop environment except the one selected before the upgrade

[Ali Elshishini]

After upgrade to ubuntu 12.10 cannot selected any other desktop environment except the one selected before the upgrade
Clicking any other option does nothing

It maybe important to not that from all the options only gnome-classic is selectable
and is selected by default
And gnome-classic was the DE I was using before upgrading to ubuntu 12.10 from ubuntu 12.04

Also here is the content of /var/lib/AccountsService/users/<my-user-name>

[User]
XSession=gnome-classic
XKeyboardLayouts=us;ara;
Background=/usr/share/images/desktop-base/joy.xml

few mentioned this file when I was searching for this bug, for similar bugs

I would like to also add, that i saw the following bugs
Bug #1052453 and Bug #1059235

But the bug i have is bit different in details, I cannot select anything except gnome-classic, which was also my DE before the upgrade

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: lightdm 1.4.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic i686
ApportVersion: 2.6.1-0ubuntu3
Architecture: i386
Date: Fri Oct 19 23:18:25 2012
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta i386 (20100318)
ProcEnviron:
 TERM=rxvt-unicode
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: lightdm
UpgradeStatus: Upgraded to quantal on 2012-10-19 (0 days ago)

[Ali Elshishini (shishini)]

I also have installed many Desktop Environment, I cannot scroll down to lower option to select them
I am not sure how to report this as a different bug, since i cannot select even the visible options

So maybe i should wait until i see this fixed

[Sebastien Bacher (seb128)]

thank you for your bug report, not sure about the "can't select a session" bug but the scrolling issue is bug #1068605