diff --git a/xCAT-server/share/xcat/install/scripts/post.ubuntu b/xCAT-server/share/xcat/install/scripts/post.ubuntu
index 2da17c8f2..9609c4151 100755
--- a/xCAT-server/share/xcat/install/scripts/post.ubuntu
+++ b/xCAT-server/share/xcat/install/scripts/post.ubuntu
@@ -191,7 +191,13 @@ if [[ -r /boot/grub/menu.lst ]]; then
 sed -i 's/^serial/#serial/' /boot/grub/menu.lst
 sed -i 's/^terminal/#terminal/' /boot/grub/menu.lst
 elif [[ -r /boot/grub/grub.cfg ]] ; then
-update-grub
+UPDATEGRUB=1
+fi
+export PROVMETHOD=#TABLE:nodetype:THISNODE:provmethod#
+export KERNELARGS=#TABLE:linuximage:$PROVMETHOD:addkcmdline#
+if [[ -n $KERNELARGS ]] ; then
+  sed -i "s/\(GRUB_CMDLINE_LINUX=\).*/\1\"$KERNELARGS\"/" /etc/default/grub
+  UPDATEGRUB=1
 fi
 if echo "$ARCH" | grep -i 'ppc64'; then
     CONSOLE="hvc$CONSOLEPORT"
@@ -200,7 +206,7 @@ if echo "$ARCH" | grep -i 'ppc64'; then
     else
         echo "GRUB_CMDLINE_LINUX_DEFAULT=\"console=$CONSOLE\"" > /etc/default/grub
     fi
-    update-grub
+    UPDATEGRUB=1
 
 cat >/etc/init/$CONSOLE\.conf << 'EOF'
 start on stopped rc RUNLEVEL=[2345] and (not-container or container container CONTAINER=lxc or container CONTAINER=lxc-libvirt)
@@ -220,6 +226,9 @@ script
 end script
 EOF
 fi
+if [[ $UPDATEGRUB -eq 1 ]]; then
+  update-grub
+fi
 sed -i 's/\(deb.*security.*\)/#\1/' /etc/apt/sources.list
 #iso does not contains source deb packages
 sed -i 's/^\(\s*deb-src.*install.*\)$/#\1/g' /etc/apt/sources.list