added -t nodevtmpfs to umount in rc.shutdown to avoid error
in unmounting filesystems
# write to wtmp
halt -w
-if [ is_true "$USELVM" ] && [ -x /sbin/vgchange ]; then
+if is_true "$USELVM" && [ -x /sbin/vgchange ]; then
status_begin "Deactivating monitoring of LVM2 groups"
/sbin/vgchange --monitor n
status_check
status_check
status_begin "Unmounting non-API filesystems"
-umount -a
+umount -a -t nodevtmpfs
status_check
status_begin "Remounting root filesystem read-only"