So the hub in my setup is unpowered. But I have tried powering up the USB devices first. Then powering up the beagle bone . In this case the two USB show up in the output of 'lsusb'.
I am working on finding a powered USB hub to try this with. But ideally I'd like to use an unpowered hub. -Karina Sent from my iPhone > On Mar 22, 2016, at 12:53 AM, Chris Morgan <chmor...@gmail.com> wrote: > >> 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. >> 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 a topic in the Google > Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/nzPuic8Eq-k/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > 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.
