From: Joakim Tjernlund <Joakim.Tjernlund@infinera.com>
To: "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>
Cc: "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>
Subject: Re: ttyACM strange chars appearing at connect
Date: Tue, 19 May 2020 13:24:19 +0000 [thread overview]
Message-ID: <51f1e0138b5ac6dab88f1630f1298d650ad90f13.camel@infinera.com> (raw)
In-Reply-To: <20200519125400.GA410029@kroah.com>
On Tue, 2020-05-19 at 14:54 +0200, Greg KH wrote:
> CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.
>
>
> On Tue, May 19, 2020 at 12:14:55PM +0000, Joakim Tjernlund wrote:
> > Whenever we connect a Linux laptop(4.19.118) to our ttyACM serial gadget we can see som strange
> > chars appearing in our gadget:
> > 03�`3�03�x�x(in hex: 3033 efbf bd60 33ef bfbd 3033 efbf bd78 efbf bd78)
> > They appear witch c.a 1 sec in between.
> > I assume it is the laptops ACM driver emitting those, but why? Can these chars be turned off?
>
> It's a program on your laptop probing the device. Usually modemmanager
> or something like that.
Ahh, makes sense. Now I need to see how to turn it off(NetworManager pulls it in) ...
Jocke
next prev parent reply other threads:[~2020-05-19 13:24 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-19 12:14 ttyACM strange chars appearing at connect Joakim Tjernlund
2020-05-19 12:54 ` Greg KH
2020-05-19 13:24 ` Joakim Tjernlund [this message]
2020-05-20 12:43 ` Joakim Tjernlund
2020-05-20 13:08 ` Dan Williams
2020-05-20 13:29 ` Joakim Tjernlund
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