Convert connect function to thread

Hi, i have:
QObject::connect(arduino, SIGNAL(readyRead()), this, SLOT(readSerial()));

So, my problem is, when i move the mainwindow with my mouse, my connect function stops receiving signals (freezes).
How can i convert this connect into a thread ?
I tried making a new thread, where i call the readyRead signal (arduino->readyRead()); and the readSerial (readSerial()); function. I tried debugging, and the problem is, i dont get any value inside my readSerial function from the arduino, so probably the problem is calling the readyRead function.

It works good with connect (i get the needed values), but i told you the problem above.
Can someone help me?

Thanks.