Hi everyone, I have an issue with usb devices such as mouse or touchscreen monitor and it seems related to the hub freeze. Sometimes the device stop working and the only way to resume it is to restart the system. The problem is probably related to an interference in the usb cable from the host to the device, I can see usb signals using an oscilloscope and the 5V line is not stable and sometimes it drops below 4,5V and the AM335x processor detects an over current condition and it removes the usb session. The only way I know to resume the usb is to restart BBB. I asked to TI Sitara support about the interference and they told me that a >=120uF of capacitance is needed on VBUS and better if it is near to the usb socket. From the BBB schematic I can see that the capacitance is 100uF and it is placed before the usb power switch. I have the kernel 3.8.13-bone30 and Ubuntu saucy as OS, I also tried Debian and the issue is present too. Is there a way to resume the usb session by software without restarting BBB? Is there a revising of the board in act that could consider the revising of the usb host section?
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