diff --git a/hosts/by-name/moby/polyfill.nix b/hosts/by-name/moby/polyfill.nix
index 7fef21a9d..fe4a5aba7 100644
--- a/hosts/by-name/moby/polyfill.nix
+++ b/hosts/by-name/moby/polyfill.nix
@@ -10,6 +10,7 @@
       # N.B. some deviceprofiles explicitly set SXMO_SWAY_SCALE, overwriting what we put here.
       SXMO_SWAY_SCALE = "1.5";
       SXMO_ROTATION_GRAVITY = "12800";
+      SXMO_LOCK_IDLE_TIME = "15";  # how long between screenoff -> lock -> back to screenoff
       DEFAULT_COUNTRY = "US";
       BROWSWER = "librewolf";
     };
diff --git a/pkgs/additional/sxmo-utils/0106-configurable-auto-screenoff.patch b/pkgs/additional/sxmo-utils/0106-configurable-auto-screenoff.patch
new file mode 100644
index 000000000..d54605625
--- /dev/null
+++ b/pkgs/additional/sxmo-utils/0106-configurable-auto-screenoff.patch
@@ -0,0 +1,13 @@
+diff --git a/configs/default_hooks/three_button_touchscreen/sxmo_hook_lock.sh b/configs/default_hooks/three_button_touchscreen/sxmo_hook_lock.sh
+index c9c4263..4c0fccf 100755
+--- a/configs/default_hooks/three_button_touchscreen/sxmo_hook_lock.sh
++++ b/configs/default_hooks/three_button_touchscreen/sxmo_hook_lock.sh
+@@ -37,7 +37,7 @@ sxmo_daemons.sh stop periodic_wakelock_check
+ # Go to screenoff after 8 seconds of inactivity
+ if ! [ -e "$XDG_CACHE_HOME/sxmo/sxmo.noidle" ]; then
+ 	sxmo_daemons.sh start idle_locker sxmo_idle.sh -w \
+-		timeout 8 "sxmo_hook_screenoff.sh"
++		timeout "${SXMO_LOCK_IDLE_TIME:-8}" "sxmo_hook_screenoff.sh"
+ fi
+ 
+ wait
diff --git a/pkgs/additional/sxmo-utils/default.nix b/pkgs/additional/sxmo-utils/default.nix
index 0ff64e8cf..8283f8733 100644
--- a/pkgs/additional/sxmo-utils/default.nix
+++ b/pkgs/additional/sxmo-utils/default.nix
@@ -92,6 +92,7 @@ stdenv.mkDerivation rec {
     # personal (but upstreamable) preferences:
     ./0104-full-auto-rotate.patch
     ./0105-more-apps.patch
+    ./0106-configurable-auto-screenoff.patch
   ];
 
   postPatch = ''