diff --git a/host_vars/chapek9.yml b/host_vars/chapek9.yml
index 85488c2..51f12ec 100644
--- a/host_vars/chapek9.yml
+++ b/host_vars/chapek9.yml
@@ -10,6 +10,8 @@ etc_fstab_entries_overwrite:
 rpm_ostree_kargs_overwrite:
   'i915.enable_psr=0':
     state: present
+  'mem_sleep_default=deep':
+    state: present
 
 flatpak_flatpaks_overwrite:
   org.gnome.Firmware: