FAI install PXE boot hangs: "add_mountroot_fail_hook not found"

[Frank Thommen]

Dear all,

I followed the instructions on 
http://wiki.fai-project.org/wiki/Installing_Ubuntu_Linux_with_FAI to 
install Ubuntu 14.04 from an Ubuntu 14.04 server.  However when the 
client boots via PXE, at some point it complains that in script 
/scripts/init-premount/mdadm and /scripts/init-premount/lvm2 it cannot 
find "add_mountroot_fail_hook".  Later on the boot process loops forever 
in an USB disconnnect-USB connect cycle of the USB mouse.

I'm not sure if the two issues are connected, but that's about what I 
can see on the console.

fai-setup has been run as `fai-setup -vlfk`.  fai-setup.log is attached. 
  I'm not sure what to do with the messages regarding initramfs-tools in 
the fai-setup.log, either.  The system is up-to-date:

# apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following package was automatically installed and is no longer required:
   libevdev2
Use 'apt-get autoremove' to remove it.
The following packages have been kept back:
   initramfs-tools linux-generic-lts-vivid linux-headers-generic-lts-vivid
   linux-image-generic-lts-vivid
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.
#

Any hint or reference to further reading is highly appreciated.  Also 
let me know if you need additional information.

Cheers
Frank
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