diff --git a/xCAT-server/lib/xcat/plugins/ipmi.pm b/xCAT-server/lib/xcat/plugins/ipmi.pm
index a61bae3c2..309c85cb9 100644
--- a/xCAT-server/lib/xcat/plugins/ipmi.pm
+++ b/xCAT-server/lib/xcat/plugins/ipmi.pm
@@ -8239,7 +8239,13 @@ sub loadsdrcache {
     if (!open($fh, "<$file")) {
         return (1);
     }
-    $r = retrieve_fd($fh);
+    eval {
+        $r = retrieve_fd($fh);
+    };
+    if($@){
+        xCAT::MsgUtils->message("S", "loadsdrcache: Fatal error while retrieving data from $file, $@");
+        return 1;
+    }
     unless ($r) { close($fh); return 1; }
     unless ($r->{xcat_sdrcacheversion} and $r->{xcat_sdrcacheversion} == $cache_version) { close($fh); return 1; } #version mismatch
 
diff --git a/xCAT-server/share/xcat/netboot/ubuntu/genimage b/xCAT-server/share/xcat/netboot/ubuntu/genimage
index e7bd3c9dc..a14c874e6 100755
--- a/xCAT-server/share/xcat/netboot/ubuntu/genimage
+++ b/xCAT-server/share/xcat/netboot/ubuntu/genimage
@@ -201,7 +201,7 @@ if ($netdriver) {
     if ($arch eq 'x86' or $arch eq 'x86_64') {
         @ndrivers = qw/tg3 bnx2 bnx2x e1000 e1000e igb mlx_en virtio_net/;
     } elsif ($arch eq 'ppc64el') {
-        @ndrivers = qw/bnx2 bnx2x e1000 e1000e igb mlx_en mlx4_en virtio_net/;
+        @ndrivers = qw/bnx2 bnx2x e1000 e1000e igb ibmveth ehea mlx_en mlx4_en virtio_net/;
     } elsif ($arch eq 'ppc64') {
         @ndrivers = qw/e1000 e1000e igb ibmveth ehea/;
     } elsif ($arch eq 's390x') {
@@ -1653,7 +1653,7 @@ EOMS
     # Workaround for Ubuntu 18.04 busybox bug
     # https://bugs.launchpad.net/ubuntu/+source/busybox/+bug/1753572
     # On Ubuntun 18.04, will use GNU cpio instead of busybox cpio
-    if ("ubuntu18.04" eq $osver) {
+    if ($osver = ~ /^18.04/) {
         foreach ("bin/cpio") {
             getlibs($_);
             push @filestoadd, $_;