diff --git a/multi-node-aio/playbooks/deploy-vms.yml b/multi-node-aio/playbooks/deploy-vms.yml
index 289a0d3b..bad7289a 100644
--- a/multi-node-aio/playbooks/deploy-vms.yml
+++ b/multi-node-aio/playbooks/deploy-vms.yml
@@ -138,6 +138,20 @@
         - src: "{{ lookup('env', 'HOME') }}/.ssh/id_rsa.pub"
           dest: /root/.ssh/id_rsa.pub
 
+# In vm-post-install-script.sh.j2 we chattr +i the interfaces file to prevent
+# the preseed system from overwriting the file after we've modified it.  The
+# task below simply removes the immutable attribute.
+- name: Remove immutable attr from /etc/network/interfaces
+  hosts: vm_servers
+  gather_facts: true
+  tasks:
+    - file:
+        path: /etc/network/interfaces
+        attr: ""
+      when:
+        - ansible_distribution | lower == "ubuntu"
+        - ansible_distribution_release | lower == "trusty"
+
   environment: "{{ deployment_environment_variables | default({}) }}"
 
   tags:
diff --git a/multi-node-aio/playbooks/pxe/debian/vm-post-install-script.sh.j2 b/multi-node-aio/playbooks/pxe/debian/vm-post-install-script.sh.j2
index 20034141..ee9ee5f6 100644
--- a/multi-node-aio/playbooks/pxe/debian/vm-post-install-script.sh.j2
+++ b/multi-node-aio/playbooks/pxe/debian/vm-post-install-script.sh.j2
@@ -13,6 +13,11 @@ echo "{{ tftp_ssh_key }}" >> /root/.ssh/authorized_keys
 
 wget --no-proxy http://{{ tftp_server }}/networking/$(cat /etc/hostname)-bridges.cfg -O /etc/network/interfaces.d/vm-bridges.cfg
 wget --no-proxy http://{{ tftp_server }}/networking/basic-debian-interface.cfg -O /etc/network/interfaces
+# Trusty VMs seem to have their interfaces file overwritten after we write to
+# it, so we make it immutable to ensure no further changes take place
+# NOTE: We remove the immutable attr in deploy-vms.yml once the instance is up
+#       and accessible.
+[[ "$(lsb_release -sc)" == "trusty" ]] && chattr +i /etc/network/interfaces
 
 cat > /etc/network/if-up.d/post-up-rules <<EOF
 #!/usr/bin/env bash
diff --git a/multi-node-aio/playbooks/pxe/debian/vm.preseed.j2 b/multi-node-aio/playbooks/pxe/debian/vm.preseed.j2
index d5c97633..d8f00949 100644
--- a/multi-node-aio/playbooks/pxe/debian/vm.preseed.j2
+++ b/multi-node-aio/playbooks/pxe/debian/vm.preseed.j2
@@ -215,8 +215,6 @@ d-i passwd/root-password-again password secrete
 # This is fairly safe to set, it makes grub install automatically to the MBR
 # if no other operating system is detected on the machine.
 d-i grub-installer/only_debian boolean true
-d-i grub-installer/with_other_os boolean true
-d-i grub-installer/bootdev string default
 
 # Post Install