diff --git a/crates/lumen-host/src/m0.rs b/crates/lumen-host/src/m0.rs
index 6f68d14..6e9ae10 100644
--- a/crates/lumen-host/src/m0.rs
+++ b/crates/lumen-host/src/m0.rs
@@ -59,6 +59,10 @@ pub fn run(opts: Options) -> Result<()> {
         }
     };
 
+    // Activate the capturer so the portal/PipeWire process callback actually delivers frames
+    // (it gates the per-frame de-pad on `active`; idle by default so reconnects are cheap).
+    capturer.set_active(true);
+
     // The first frame establishes the authoritative dimensions (the portal's negotiated
     // size, or the synthetic size) used to configure the encoder.
     let first = capturer.next_frame().context("capture first frame")?;
diff --git a/crates/lumen-host/src/main.rs b/crates/lumen-host/src/main.rs
index 654225a..5c6d22a 100644
--- a/crates/lumen-host/src/main.rs
+++ b/crates/lumen-host/src/main.rs
@@ -85,7 +85,9 @@ fn input_test() -> Result<()> {
         y,
         flags: 0,
     };
-    tracing::info!("input-test: injecting a mouse square + 'A'/click taps for ~8s (watch wev / focused app)");
+    tracing::info!(
+        "input-test: injecting a mouse square + 'A'/click taps for ~8s (watch wev / focused app)"
+    );
     for i in 0..160u32 {
         let (dx, dy) = match (i / 10) % 4 {
             0 => (12, 0),