From the backtrace it looks like a crash in the colord-kde KDE daemon
module.
** Package changed: kde4libs (Ubuntu) = colord-kde (Ubuntu)
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** Package changed: ubuntu = kde4libs (Ubuntu)
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https://bugs.launchpad.net/bugs/1073890
Title:
kded4/kdeinit4 crashes with segmentation fault (segfault) after
logging in
