Hi Justin,

I think it is safe to say that Debian is not the cause. Well at least not
directly. I have experienced the same issue trying to use g_ether, but find
the ethernet port to work perfectly.

Long story short, My BBB came with Angstrom ( RevA bought at launch last
year ), and I quickly moved to Debian. For the longest time I ran from
ethernet, until I had the idea that perhaps I could squeeze a bit more
performance if I used g_ether instead.

What I found was similar or perhaps exactly what you're experiencing. The
connection would stop responding after a short period, and would not work
again until I ping'd each way from the command line. After which the
connection would shortly stop responding again. After a few days trying to
troubleshoot the issue, and calling no joy I switched back to ethernet
only, and have not had a problem since.

I have my suspicions that this problem is either related to to a few things
but the g_ether software running on the BBB comes to mind first. Other
possible suspects would be a faulty USB cable ( working well enough to
provide power ), or the Windows drivers on the PC side. But I am fairly
certain your ( and mine ) BBB's are fine, as well as the PC' they're
connected to.At least my own laptop the BBB connects to works perfectly in
every other aspect.


On Sun, Jun 15, 2014 at 6:57 PM, Justin Morgan <[email protected]> wrote:

> I received my new BBB Rev C board on Friday, and updated the Debian image
> last night after determining that it did not ship with the latest image.
> I'm seeing a problem with the Gadget Serial port (the one on the Mini-B USB
> port).
>
> I have the USB cable connected to my PC (one of the USB 3.0 ports on the
> front as they are very convenient to reach), which is home built and
> running Windows 7 Home 64-bit. [That's just enough Windows to do what I
> need to do.] My terminal of choice is PuTTY.
>
> [I also have my other BBB plugged into the other front USB 3.0 port, if
> that makes a difference. It is a rev B running Angstrom Linux. I don't
> think I am seeing this issue on it.]
>
> Occasionally, the BBB stops responding on that serial port. At first I
> thought it was locking up entirely, but now that I have my monitor
> cooperating better with the BBB, I was able to determine that the BBB was
> still running. However, tried restarting the BBB, and it panicked on
> shutdown (something about not synchronizing due to a stuck thread).
> Unfortunately, I can't find the panic log, if there is one...
>
> This did not restore connectivity to the serial port, but a restart of my
> PC did. For now.
>
> I am not familiar enough with the Gadget ports to continue trouble
> shooting from this point. Is it the BBB, Debian, my PC, the Gadget Serial
> driver, or something else?
>
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