Here is our configuration:

    # rgrep ipv6 /etc/sysctl.*
    /etc/sysctl.conf:net.ipv6.conf.all.disable_ipv6=1
    /etc/sysctl.conf:net.ipv6.conf.default.disable_ipv6=1
    /etc/sysctl.conf:net.ipv6.conf.lo.disable_ipv6=1
    /etc/sysctl.conf:net.ipv6.conf.all.forwarding=0
    /etc/sysctl.d/10-ipv6-privacy.conf:net.ipv6.conf.all.use_tempaddr = 2
    /etc/sysctl.d/10-ipv6-privacy.conf:net.ipv6.conf.default.use_tempaddr = 2

    # rgrep ipv6 /etc/modprobe*
    /etc/modprobe.d/blacklist-eole.conf:blacklist ipv6

The problem is fixed in Xenial with the following changelog:

    tftp-hpa (5.2+20150808-1ubuntu1.16.04.1) xenial; urgency=medium
    
      * Replace the default value of TFTP_ADDRESS to :69 instead of [::]:69.
        The previous default caused a failure to start when the NIC is not
        available at startup time (LP: #1342580)
    
     -- Louis Bouchard <[email protected]>  Tue, 07 Mar 2017 12:00:08 
+0100

and in Trusty with the following changelog:

    tftp-hpa (5.2-7ubuntu3.1) trusty; urgency=medium
    
      * Replace the default value of TFTP_ADDRESS to :69 instead of [::]:69.
        The previous default caused a failure to start when the NIC is not
        available at startup time (LP: #1342580)
    
     -- Louis Bouchard <[email protected]>  Thu, 09 Feb 2017 18:13:54 
+0100


    # apt install tftpd-hpa
    Reading package lists... Done
    Building dependency tree       
    Reading state information... Done
    Suggested packages:
      pxelinux
    The following NEW packages will be installed:
      tftpd-hpa
    0 upgraded, 1 newly installed, 0 to remove and 2 not upgraded.
    Need to get 39,1 kB of archives.
    After this operation, 115 kB of additional disk space will be used.
    Get:1 http://eole.ac-dijon.fr/ubuntu xenial-updates/main amd64 tftpd-hpa 
amd64 5.2+20150808-1ubuntu1.16.04.1 [39,1 kB]
    Fetched 39,1 kB in 0s (2 799 kB/s)   
    Preconfiguring packages ...
    Selecting previously unselected package tftpd-hpa.
    (Reading database ... 110622 files and directories currently installed.)
    Preparing to unpack .../tftpd-hpa_5.2+20150808-1ubuntu1.16.04.1_amd64.deb 
...
    Unpacking tftpd-hpa (5.2+20150808-1ubuntu1.16.04.1) ...
    Processing triggers for ureadahead (0.100.0-19) ...
    Processing triggers for systemd (229-4ubuntu17) ...
    Processing triggers for man-db (2.7.5-1) ...
    Setting up tftpd-hpa (5.2+20150808-1ubuntu1.16.04.1) ...
    Processing triggers for ureadahead (0.100.0-19) ...
    Processing triggers for systemd (229-4ubuntu17) ...

Regards.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1474682

Title:
  package tftpd-hpa 5.2+20140608-3ubuntu1 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 1

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