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Imx6q trouble with USB and PCIE

Question asked by Alexis Fronteau on Apr 8, 2019
Latest reply on Apr 8, 2019 by CarlosCasillas

Hi, I am developing an application based on Imx6Q with a linux kernel 3.14.52. I have a USB3.0 connecting to the PCIE port of the imx6q through a xHCI Host controller (TUSB7320) and I also have a Wifi USB module (RLT8723bu) connecting to a usb port. the wifi module ahs 2 interfaces so it can be used simultaneously in Acess Point and in client mode. When I set the client mode interface up, I can ping a distant server on internet but when I plug an USB key, the interface shut down and re-open when I unplug the USB Key. Did I miss something in USB configuration or something ? 

I am using wpa_supplicant and udhcpc to manage the client connection.