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 beagleboard+unsubscr...@googlegroups.com > <mailto:beagleboard+unsubscr...@googlegroups.com>. > 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
