diff --git a/encrypt-swap-Ubuntu-20.04.md b/encrypt-swap-Ubuntu-20.04.md
index d5d6dbe..6c7e106 100644
--- a/encrypt-swap-Ubuntu-20.04.md
+++ b/encrypt-swap-Ubuntu-20.04.md
@@ -98,6 +98,8 @@ Nom de fichier				Type		Taille	Utilisé	Priorité
 root@laptop:/root# 
 ~~~
 
+=======
+
 ### to be solve
 
 ~~~
@@ -105,6 +107,10 @@ cryptsetup: ERROR: Couln't resolve device rpool/ROOT/ubuntu_...
 cryptsetup: WARNING: Couln't determine root device
 ~~~
 
+~~~
+- don't work anymore after upgrade form 20.04 to 21.04 on Full ZFS with zfs encrypt and encrypted swap but still work if swap is unencrypted.
+- just test it sucessfully again (12.2021) on a 20.04 Full ZFS with zfs unencrypt and encrypted swap.
+~~~
 
 ## sources
 * [wiki.archlinux.org - dm-crypt/Swap encryption](https://wiki.archlinux.org/index.php/Dm-crypt/Swap_encryption#LVM_on_LUKS)