Public bug reported:

After upgrading to Precise, X locale is defaulted to en_US regardless of
system-wide and user specific options.

I found out about this issue when I tried to login via the KDM greeter
and it was not recognizing my password. I got pam authentication
failures in the auth.log, but authorizations files were just fine. In
fact, I could login from the console and within KDE itself. When I tried
typing on the KDM username box, I found out that special characters were
not corresponding to my it_IT layout. My password was including the
special character @ that was typed as ; thus not accepting my password.
I worked this around by changing password to not include any special
character.

I installed LightDM and the problem persisted, so I thought about an
evdev bug.

I posted this issue on the Kubuntu Forums at first, where you can find
more information and logs [
http://www.kubuntuforums.net/showthread.php?58623-Can-t-login-via-KDM-
after-upgrading-to-Precise ].

Recently, German users were experiencing the same problem [
http://forum.ubuntuusers.de/topic/kein-login-in-kdm-nach-upgrade/ ]
where I found out that the only thing in common is a wireless keyboard.

I bought a Logitech K800 (which uses a Unifying Receiver) when I was
running Oneiric, making this the first time I upgraded my distribution
with a wireless keyboard. If that happens to be the problem, It could
mean that my keyboard locale was not recognized during the upgrade
process.

I'm attaching some configuration files and logs, please tell me if you
need more information.

$ lsb_release -a
LSB Version:    
core-2.0-ia32:core-2.0-noarch:core-3.0-ia32:core-3.0-noarch:core-3.1-ia32:core-3.1-noarch:core-3.2-ia32:core-3.2-noarch:core-4.0-ia32:core-4.0-noarch
Distributor ID: Ubuntu
Description:    Ubuntu 12.04 LTS
Release:        12.04
Codename:       precise

$ apt-cache policy xserver-xorg
xserver-xorg:
  Installato: 1:7.6+12ubuntu1
  Candidato:  1:7.6+12ubuntu1
  Tabella versione:
 *** 1:7.6+12ubuntu1 0
        500 http://it.archive.ubuntu.com/ubuntu/ precise/main i386 Packages
        100 /var/lib/dpkg/status

$ apt-cache policy xserver-xorg-input-evdev
xserver-xorg-input-evdev:
  Installato: 1:2.7.0-0ubuntu1
  Candidato:  1:2.7.0-0ubuntu1
  Tabella versione:
 *** 1:2.7.0-0ubuntu1 0
        500 http://it.archive.ubuntu.com/ubuntu/ precise/main i386 Packages
        100 /var/lib/dpkg/status

$ apt-cache policy locales
locales:
  Installato: 2.13+git20120306-3
  Candidato:  2.13+git20120306-3
  Tabella versione:
 *** 2.13+git20120306-3 0
        500 http://it.archive.ubuntu.com/ubuntu/ precise/main i386 Packages
        100 /var/lib/dpkg/status

$ apt-cache policy console-data
console-data:
  Installato: (nessuno)
  Candidato:  2:1.12-1
  Tabella versione:
     2:1.12-1 0
        500 http://it.archive.ubuntu.com/ubuntu/ precise/universe i386 Packages

$ apt-cache policy kdm
kdm:
  Installato: 4:4.8.3-0ubuntu0.1~ppa2
  Candidato:  4:4.8.3-0ubuntu0.1~ppa2
  Tabella versione:
 *** 4:4.8.3-0ubuntu0.1~ppa2 0
        500 http://ppa.launchpad.net/kubuntu-ppa/ppa/ubuntu/ precise/main i386 
Packages
        100 /var/lib/dpkg/status
     4:4.8.2a-0ubuntu4 0
        500 http://it.archive.ubuntu.com/ubuntu/ precise/main i386 Packages

** Affects: xserver-xorg-input-evdev (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: auth authentication characters failure gdm kdm keyboard lightdm locale 
login mapping pam password precise screen special unix wrong x11 xkb xorg

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-input-evdev in Ubuntu.
https://bugs.launchpad.net/bugs/995715

Title:
  X defaulting keyboard locale to US at login after upgrading
  distribution

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-evdev/+bug/995715/+subscriptions

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