unittest confirms multiple keyboards just werk

src/device/output/keyboard_test.go

@@ -9,11 +9,28 @@ import (
 	"time"
 )
 
+func TestTwoKeyboards(t *testing.T) {
+	kb1 := output.NewKeyboard()
+	t.Cleanup(kb1.Close)
+	kb2 := output.NewKeyboard()
+	t.Cleanup(kb2.Close)
+
+	kb1.Press(key.D)
+	kb2.Press(key.W)
+	t.Log("pressing 'w' and 'd' over 2 keyboards for 5 seconds")
+	for i := 0; i < 5; i++ {
+		t.Logf("\t%d...", 5-i)
+		time.Sleep(time.Second)
+	}
+	t.Logf("releasing")
+	kb1.Press()
+	kb2.Press()
+}
+
 func TestKeyboardIntegration(t *testing.T) {
 	kb := output.NewKeyboard()
 	t.Cleanup(kb.Close)
 
-	t.Run("hold d", func(t *testing.T) {
 	t.Log("pressing 'd' for 5 seconds")
 	kb.Press(key.D)
 	for i := 0; i < 5; i++ {
@@ -22,5 +39,4 @@ func TestKeyboardIntegration(t *testing.T) {
 	}
 	t.Logf("releasing")
 	kb.Press()
-	})
 }