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From: Anssi Saari <anssi.saari@usenet.mail.kapsi.fi>
Newsgroups: comp.os.linux.misc
Subject: Re: sudo override
Date: Thu, 17 Oct 2024 13:01:08 +0300
Organization: An impatient and LOUD arachnid
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Lawrence D'Oliveiro <ldo@nz.invalid> writes:

> On Thu, 17 Oct 2024 00:58:01 -0400, David W. Hodgins wrote:
>
>> Plugging in the device will create the /dev entry only if the package
>> modemmanager is installed.
>
> I don’t have modemmanager installed. I plugged in a USB-serial adapter, 
> and /dev/ttyUSB0 appeared. It disappeared when I unplugged the adapter.

Same here, for example the LTE module on my router has five USB-serial
interfaces (ttyUSB0-ttyUSB4) and modemmanager isn't installed.

In fact, I think It would be quite odd if modemmanager were required for
USB-serial adapter udev rules.