I can easily reproduce the "klauncher[4754]: segfault at b7f4b2e4 eip b738725e 
esp bfffcc00 error 7" issue on qemu/kvm with fresh install without gnome:
1. /opt/kvm/bin/qemu-system-x86_64 -net nic -net tap,ifname=tap0 -m 512 
kubuntu.qcow2
2. after login klaunch and xorg will crash
3. workaround: 
reduce screen resolution, so i edited "sudo vim /etc/X11/xorg.conf" and set 
Depth 16
Modes "1024x768"


Ubuntu with Gnome do not have this issue with biger resolution.

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klauncher crashed with SIGSEGV in __kernel_vsyscall()
https://bugs.launchpad.net/bugs/141418
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