Solution found in:
https://bugs.launchpad.net/ubuntu/+source/xorg-server-lts-raring/+bug/1246384
Edit as root:
/var/usr/dpkg/info/xserver-common-lts-raring.postrm or...
Type: Posts; User: WHK; Keyword(s):
Solution found in:
https://bugs.launchpad.net/ubuntu/+source/xorg-server-lts-raring/+bug/1246384
Edit as root:
/var/usr/dpkg/info/xserver-common-lts-raring.postrm or...
Same problem after update from ubuntu 12 to 13
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