Try to read frames immediately instead of waiting for a readable event. We may already have received it before.

lib/units/device/plugins/screen/stream.js

@@ -42,6 +42,7 @@ module.exports = syrup.serial()
       this.failCounter = new FailCounter(3, 10000)
       this.failCounter.on('exceedLimit', this._failLimitExceeded.bind(this))
       this.failed = false
+      this.readableListener = this._readableListener.bind(this)
     }
 
     util.inherits(FrameProducer, EventEmitter)
@@ -298,12 +299,15 @@ module.exports = syrup.serial()
         return Promise.resolve(true)
       }
 
+      socket.stream.removeListener('readable', this.readableListener)
+
       var endListener
       return new Promise(function(resolve/*, reject*/) {
           socket.on('end', endListener = function() {
             resolve(true)
           })
 
+          socket.stream.resume()
           socket.end()
         })
         .finally(function() {
@@ -373,11 +377,11 @@ module.exports = syrup.serial()
 
     FrameProducer.prototype._readFrames = function(socket) {
       this.needsReadable = true
+      socket.on('readable', this.readableListener)
 
-      socket.on('readable', function() {
-        this.readable = true
-        this._maybeEmitReadable()
-      }.bind(this))
+      // We may already have data pending. Let the user know they should
+      // at least attempt to read frames now.
+      this.readableListener()
     }
 
     FrameProducer.prototype._maybeEmitReadable = function() {
@@ -387,6 +391,11 @@ module.exports = syrup.serial()
       }
     }
 
+    FrameProducer.prototype._readableListener = function() {
+      this.readable = true
+      this._maybeEmitReadable()
+    }
+
     function createServer() {
       log.info('Starting WebSocket server on port %d', screenOptions.publicPort)