"Failed at step NAMESPACE" errors

[Wouter Van Hemel]

Hello,

Since a month or so a few services fail to start on my system (Debian 
Testing) and I'm having trouble bringing up a graphical session without 
manual intervention.

Problematic daemons include colord and rtkit-daemon:


Failed at step NAMESPACE spawning /usr/lib/colord/colord: Operation not 
permitted


My /tmp is a symlink to /var/tmp (because I like to keep my / clean):

$ ls -ld /tmp
lrwxrwxrwx 1 root root 8 Feb  2  2014 /tmp -> /var/tmp


Could this be related, and if so, how do I solve it? Should I fiddle 
with tmpfiles.d or just abandon the symlinking?


Thanks for any pointers,

   Wouter Van Hemel