The fix that worked for me is to add the libnss-resolve package. This changes the /etc/nsswitch.conf file to actually attempt the dns lookup after the other conditions have started the UDB fallback mode. Bug 1727237 had a comment requesting if libnss-resolve were installed, answered "no", but no further suggestions regarding the package. The package changes the hosts line in the nsswitch.conf to: hosts: files mdns4_minimal [NOTFOUND=return] resolve [!UNAVAIL=return] dns myhostname
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