No, I don't use an external hub, I directly connect the device to the BBB. I use the BBB with mouse or touchscreen but not both at the same time. The issue is present indipendently using one or the other device.
Il giorno lunedì 4 gennaio 2016 23:11:48 UTC+1, Wulf Man ha scritto: > > Is this a external powered hub ? > > > On 1/4/2016 2:33 PM, Alessio wrote: > > 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? > > Thanks. > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > For more options, visit https://groups.google.com/d/optout. > > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
