I can not login

Oh, I should add that I started out with having the same problem with the login when I used the binary drivers. I then tried to remove them, but no success, the same error that is reported in this bug.

I should also add explicitly what is written in Xorg.0.log and syslog when I try to login

[ 2919.224]
Backtrace:
[ 2919.224] 0: /usr/bin/X (xorg_backtrace+0x26) [0x460566]
[ 2919.224] 1: /usr/bin/X (0x400000+0x64b7a) [0x464b7a]
[ 2919.224] 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fc8fdac6000+0x10060) [0x7fc8fdad6060]
[ 2919.224] 3: /lib/x86_64-linux-gnu/libc.so.6 (__select+0x13) [0x7fc8fcabb8f3]
[ 2919.224] 4: /usr/bin/X (WaitForSomething+0x19b) [0x45dffb]
[ 2919.225] 5: /usr/bin/X (0x400000+0x2f912) [0x42f912]
[ 2919.225] 6: /usr/bin/X (0x400000+0x232fe) [0x4232fe]
[ 2919.225] 7: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xed) [0x7fc8fca0230d]
[ 2919.225] 8: /usr/bin/X (0x400000+0x235ed) [0x4235ed]
[ 2919.225]
Caught signal 3 (Quit). Server aborting
[ 2919.225]
Please consult the The X.Org Foundation support
  at http://wiki.x.org
 for help.
[ 2919.225] Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 2919.225]
[ 2919.231] (II) Power Button: Close
[ 2919.231] (II) UnloadModule: "evdev"
[ 2919.231] (II) Unloading evdev
[ 2919.268] (II) Video Bus: Close
[ 2919.268] (II) UnloadModule: "evdev"
[ 2919.268] (II) Unloading evdev
[ 2919.288] (II) Sleep Button: Close
[ 2919.288] (II) UnloadModule: "evdev"
[ 2919.288] (II) Unloading evdev
[ 2919.316] (II) CKF7063: Close
[ 2919.316] (II) UnloadModule: "evdev"
[ 2919.316] (II) Unloading evdev
[ 2919.360] (II) Logitech USB Optical Mouse: Close
[ 2919.360] (II) UnloadModule: "evdev"
[ 2919.360] (II) Unloading evdev
[ 2919.384] (II) AT Translated Set 2 keyboard: Close
[ 2919.384] (II) UnloadModule: "evdev"
[ 2919.384] (II) Unloading evdev
[ 2919.411] (II) UnloadModule: "synaptics"
[ 2919.411] (II) Unloading synaptics
[ 2919.424] (II) HP WMI hotkeys: Close
[ 2919.425] (II) UnloadModule: "evdev"
[ 2919.425] (II) Unloading evdev
[ 2919.425] (II) AIGLX: Suspending AIGLX clients for VT switch
[ 2919.429] ddxSigGiveUp: Closing log

==> /var/log/syslog <==
Nov 8 08:42:13 burken acpid: client 24671[0:0] has disconnected
Nov 8 08:42:13 burken acpid: client connected from 27478[0:0]
Nov 8 08:42:13 burken acpid: 1 client rule loaded

This seems to be the same problem as bug 532047.
So the problem is not really fixed?

I've done:
sudo mv /etc/init/plymouth-splash.conf /etc/init/plymouth-splash.conf.disabled

and added the line vt=7 to /etc/lightdm/lightdm.conf as below.

[SeatDefaults]
greeter-session=unity-greeter
user-session=ubuntu
vt=7

The login now crashes when I press 2 (ENTER seems to crash it only some of the times ) but ENTER crashes it if I open a terminal window in X and press ENTER in that.
Pressing 2 after login also crashes X.

This error is in general caused by some other software setting the console in an incorrect state. It's not an X bug, but a bug in something else which has changed X's console underneath it.

Did you install any extra packages besides the defaults when installing this system? Can you provide a package list from the system ('dpkg -l | grep ^ii') ?

I've added some extra packages after the install. Listed in the file

You have a significant number of server packages installed. It is likely that one or more of these is handling the console inappropriately at boot time.

cloud-init
monit
mysql-server-5.1
postgresql-common
tomcat6

I recommend that you try disabling each of these services in turn and reboot after disabling each one, to see if one of these is the culprit.

Thank you Steve for the suggestion. Now I've tried (and also removed cloud-init) and I found no problem, except for a service that I've written myself. When running a konsole in X and then giving the command "sudo bum" and starting the service, I see some messages from bum but also this

^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B

That doesn't seem right to me. (What can cause this?)

With limited testing it seems that this is the problem.
The service I start is a very basic bashscript that starts php programs.

I guess I'll have to look elsewhere to find why those scripts are behaving this way since it's not really an ubuntu specific issue. I can add though that the scripts did not cause any problems in 11.04.

> I see some messages from bum but also this

> ^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B^[[B

> That doesn't seem right to me. (What can cause this?)

That could certainly be related to the console being in the wrong state.

> I guess I'll have to look elsewhere to find why those scripts are
> behaving this way since it's not really an ubuntu specific issue. I can
> add though that the scripts did not cause any problems in 11.04.

This could be caused /etc/init/rc.conf having 'console output' in 11.10, which allows init scripts to interact with the console. But init scripts *should* limit their interaction to sending output. You could try redirecting input and output to /dev/null within the script, to see if this fixes the problem.

Anyway, closing this bug report as invalid. Thanks for following up.