On Tuesday, March 22, 2016, Karina <karina.b...@gmail.com> wrote: > Hi, > > I have a unpowered 2-port USB hub that I have connected to the BeagleBone > Black (Rev C). I have two (serial over ) USB devices connected to the two > port of the USB hub. They are are not powered to begin with. When i power > up the Beagle Bone, i see the USB hub listed in the output for 'lsusb'. Now > i power up the two USB device hanging off the USB hub. But i do not see the > USB devices listed in the output of 'lsusb'. Also, there is no /dev/ttyUSB* > file. For my project, it wold be ideal for the beagle bone to be powered up > before these USB devices. Any idea on what i have messed up or missed? > > I have verified that if i connect the USB device directly into the USB > port on the beagle bone black, then I can power the USB device after the > beagle bone is powered up and it shows up in the output of 'lsusb' and i > can control the device. > > Here are some more specifics about my setup. > 1. I am using the beagle bone black Rev C board. > 2. I am running Debian linux (jessie v 8.3) on the beagle bone black . The > version of the linux kernel is v3.8.15 -bone 71. > 3. I am powering the beagle bone with the power supply ( instead of over > the USB connector for etherent over USB). > > Thanks, > Karina > > -- > 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 > <javascript:_e(%7B%7D,'cvml','beagleboard%2bunsubscr...@googlegroups.com');> > . > For more options, visit https://groups.google.com/d/optout. >
Have you tried powering the hub and devices up before the bbb? Chris -- 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.
