This appears to be a nVidia driver bug. The work around is to add the
following lines to the xorg.conf file until the driver bug is fixed by
nVidia.
Section "Extensions"
Option "Composite" "Disable"
EndSection
####################################
# Xorg.0.log fragments
####################################
[ 55.774] (II) NVIDIA dlloader X Driver 270.41.19 Mon May 16 23:33:05 PDT
2011
[ 55.774] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[ 55.774] (--) using VT number 8
[ 57.152] (II) NVIDIA(0): NVIDIA GPU Quadro FX 580 (G96GL) at PCI:2:0:0
(GPU-0)
[ 57.492] (II) Module evdev: vendor="X.Org Foundation"
[ 57.492] compiled for 1.10.0.902, module version = 2.6.0
[ 57.492] Module class: X.Org XInput Driver
[ 57.492] ABI class: X.Org XInput driver, version 12.3
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https://bugs.launchpad.net/bugs/677148
Title:
KDE crash occurs randomly within minutes of login
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