Media keys working again

daemon/g910_device.h

@@ -21,7 +21,11 @@ public:
 
     // Finds a supported keyboard, opens it and detaches the kernel driver from
     // the vendor interface. Returns false (and logs) if none is found.
-    bool open();
+    //
+    // `quiet` silences the "cannot use the keyboard" lines only, which the
+    // hot-plug retry uses so an unplugged keyboard does not flood the journal
+    // with one line every retry; libusb-level failures always log.
+    bool open(bool quiet = false);
     void close();
     bool is_open() const { return handle_ != nullptr; }