问题
I'm attempting to figure out how to get a USB Bluetooth dongle to work with my BeagleBone Black. I've tried a few different ones to no avail, but have seen posts from others who seem to have had some success.
I have tried the procedure documented here: http://www.michaelhleonard.com/enable-bluetooth-on-beaglebone-black/
However, when I plug the dongle in, it doesn't even light up. Nor does it show up when I "lsusb". The BBB is being powered by a 2.5A 5V adapter, so power should not be an issue. Has anyone been able to get a USB Bluetooth Dongle working on a BeagleBone Black, and if so, which one was it, and what can I do to get it to at least power up?
回答1:
I've had a similar problem, and I think it's the usb hotplugging issue mentioned above. I stumbled into an easy workaround that works for me (running Linux 3.8). Try typing:
lsusb -v
The -v is important. If I leave it off, my device remains invisible and isn't powered on. When the -v option is present, it powers up and stays up.
回答2:
In case you are running a 3.8 kernel: usb hotplugging seems to have issues. no. 1 recommendation is booting the BBB with the usb device plugged in already until hotplugging is fixed.
the power adapter should be sufficient with 2.5 amps.
回答3:
I started a crowdfunding project to fix USB Hostplugging on Angstrom.
http://igg.me/at/eMagii/x/5581172
Have tested with USB Mouse, Keyboard, Serial adapter and hub. First I boot the system, with the USB host empty, then I plug in the above units, without problems.
They are all detected.
回答4:
While I found that there are multiple issues with my BeagleBone Black (A5C) USB host, what helped me to get past the non-detection on USB is a 1000uF 16V capacitor across the +5V and GND lines of the USB connection. I removed a bit of the insulation of a short USB extension cable and soldered the capacitor to the red and black wires.
This might be a solution only for a single A5C board, but maybe it helps on other boards as well.
来源：https://stackoverflow.com/questions/18754699/usb-bluetooth-dongle-isnt-recognized-by-beaglebone-black