#2030 fix: do not filter out unknown evdev key events

Author: sds100

CHANGELOG.md

@@ -7,6 +7,9 @@
 - #2024 support Expert mode on all Android versions supported by Key Mapper (8.0+).
 - #2025 add report bug button to home screen menu.
 
+## Fixed
+- #2030 do not filter out unknown evdev key events.
+
 ## [4.0.3](https://github.com/sds100/KeyMapper/releases/tag/v4.0.3)
 
 #### 07 February 2026

evdev/src/main/rust/evdev_manager/core/src/event_loop.rs

@@ -394,10 +394,15 @@ impl EventLoopThread {
         // Key Mapper only cares about key events. Do not send other events so latency
         // isn't introduced with the IPC.
         let consumed = match event.event_code {
-            EventCode::EV_KEY(_) => {
-                self.callback
-                    .on_evdev_event(device_id, &grabbed_device.device_info, event)
-            }
+            // See #2030. Some devices send unknown scan codes so still send them
+            // to Key Mapper.
+            EventCode::EV_KEY(_)
+            | EventCode::EV_UNK {
+                event_type: 1,
+                event_code: _,
+            } => self
+                .callback
+                .on_evdev_event(device_id, &grabbed_device.device_info, event),
             _ => false,
         };