I have also encountered the same issue after restarting KDM today. I suspect the NVIDIA binary driver is to blame, as it is very slow to start up.
To resolve the problem I set in /etc/kde4/kdm/kdmrc: [X-*-Core] ServerTimeout=120 That gives the server time to start up even though the NVIDIA driver is awful, and everything seems to be stable. Before that it would consistently time out even without any other settings. Below is the information from a normal bug report. Regards, Daniel Package: kdm Version: 4:4.2.4-1+b1 -- System Information: Debian Release: squeeze/sid APT prefers unstable APT policy: (500, 'unstable'), (101, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 2.6.30-1-amd64 (SMP w/2 CPU cores) Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages kdm depends on: ii consolekit 0.3.0-2 framework for defining and trackin ii debconf [debconf-2.0] 1.5.27 Debian configuration management sy ii kdebase-runtime 4:4.2.4-2 runtime components from the offici ii kdebase-workspace-kgreet-pl 4:4.2.4-1+b1 KDE greet libraries for authentica ii kdelibs5 4:4.2.4-1 core libraries for all KDE 4 appli ii libc6 2.9-13 GNU C Library: Shared libraries ii libck-connector0 0.3.0-2 ConsoleKit libraries ii libdbus-1-3 1.2.14-3 simple interprocess messaging syst ii libpam0g 1.0.1-9 Pluggable Authentication Modules l ii libqimageblitz4 1:0.0.4-4 QImageBlitz image effects library ii libqt4-qt3support 4.5.1-2 Qt 3 compatibility library for Qt ii libqt4-svg 4.5.1-2 Qt 4 SVG module ii libqt4-xml 4.5.1-2 Qt 4 XML module ii libqtcore4 4.5.1-2 Qt 4 core module ii libqtgui4 4.5.1-2 Qt 4 GUI module ii libstdc++6 4.4.0-7 The GNU Standard C++ Library v3 ii libx11-6 2:1.2.1-1 X11 client-side library ii libxau6 1:1.0.4-2 X11 authorisation library ii libxdmcp6 1:1.0.2-3 X11 Display Manager Control Protoc ii libxtst6 2:1.0.3-1 X11 Testing -- Resource extension ii lsb-base 3.2-22 Linux Standard Base 3.2 init scrip Versions of packages kdm recommends: ii kde-window-manager [x-wind 4:4.2.4-1+b1 the KDE 4 window manager (KWin) ii kdebase 4:4.2.4-1 base applications from the officia ii konsole [x-terminal-emulat 4:4.2.4-1 X terminal emulator for KDE 4 ii logrotate 3.7.7-3 Log rotation utility ii xserver-xorg-core [xserver 2:1.6.1.901-3 Xorg X server - core server ii xterm [x-terminal-emulator 243-1 X terminal emulator Versions of packages kdm suggests: ii kdepasswd 4:4.2.4-1 password changer for KDE 4 -- debconf information: kdm/stop_running_server_with_children: false * shared/default-x-display-manager: kdm kdm/daemon_name: /usr/bin/kdm -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org