I have been working with TM4C out of the box example code (qs_iot) with exosite. When the launchpad is powered by an external power supply and connected to router through ethernet cable, I am able to connect the controller with exosite website. On the other hand, my PC hangs when the controller is powered up with my laptop & the controller is still connected to the router. When I remove the ethernet cable, my laptop works fine (launchpad still powered with laptop). I even checked the voltage on the controller and it is 3.3 VDC. Also, I don't face any issue when the launchpad is connected to Laptop's ethernet port and powered up by Laptop's USB port.
Are there any power/EMI issues I am missing in my setup? My ultimate goal is to get access to the serial port of the launchpad (with laptop) while the controller is connected to the ethernet.
Any help would be appreciated.