Public bug reported:
Ubuntu 12.04 (Precise Pangolin) i386
kdm 4:4.8.4a.0ubuntu0.1
Both /etc/kde4/kdm/kdmrc and the package docs
(/usr/share/doc/README.Debian) specify that /etc/default/kdm.d can be
used to specify some parameters and override kdmrc. However, this
doesn't seem to function and I
Similar report:
http://www.kubuntuforums.net/showthread.php?58623-Can-t-login-via-KDM-after-upgrading-to-Precisep=297473viewfull=1#post297473
Old question possibly indicating this is an old problem:
https://answers.launchpad.net/ubuntu/+source/kdebase-workspace/+question/52742
Possibly related:
Seems like accented character sequences (dead keys) are enabled as it affects
kdm and most everything in KDE. The following are affected on a US keyboard:
~ (tilde)
` (grave accent)
' (apostrophe)
(ampersand)
^ (caret)
(double quote)
To generate these characters they need to be entered twice.