I've been seeing that a 3G modem I bought (Huawei E3131B) has been giving 
me some problems with the BBB.

Firstly, it sometimes picks up the modem and powers it (light on modem 
flashing), but then somehow loses contact with it, and the modem no longer 
functions properly and is not picked up.
Second, my Angstrom hangs sometimes when I plug the modem in and out and 
when I run programs such as ppp which are meant to connect it.

My best guess is that there is something wrong with the USB driver. How 
would I go about debugging this?

Cornel

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