USB serial device (GPS w/ PL2303) shows up in lsusb output, but won't enumerate as /dev/ttyUSB0

balenaFin
1

Hi! When I plug in my GPS, and run lsusb, I see this which is correct:
Bus 001 Device 004: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port
however, I don’t see a device in the output of “ls /dev/tty*”
When I restart the container, it does return and look as you would expect (see below).
SO is there any way to trigger/force the enumeration and make the system look for my GPS/Serial?

BTW I’ve noticed this happens with my attached USB audio codec as well, but only once a while.

Thank you.

root@7a59785:/usr/src/app/src/acoustic_sensors_acquire_sw# ls /dev/tty*
/dev/tty /dev/tty19 /dev/tty3 /dev/tty40 /dev/tty51 /dev/tty62
/dev/tty0 /dev/tty2 /dev/tty30 /dev/tty41 /dev/tty52 /dev/tty63
/dev/tty1 /dev/tty20 /dev/tty31 /dev/tty42 /dev/tty53 /dev/tty7
/dev/tty10 /dev/tty21 /dev/tty32 /dev/tty43 /dev/tty54 /dev/tty8
/dev/tty11 /dev/tty22 /dev/tty33 /dev/tty44 /dev/tty55 /dev/tty9
/dev/tty12 /dev/tty23 /dev/tty34 /dev/tty45 /dev/tty56 /dev/ttyAMA0
/dev/tty13 /dev/tty24 /dev/tty35 /dev/tty46 /dev/tty57 /dev/ttyUSB0
/dev/tty14 /dev/tty25 /dev/tty36 /dev/tty47 /dev/tty58 /dev/ttyprintk
/dev/tty15 /dev/tty26 /dev/tty37 /dev/tty48 /dev/tty59
/dev/tty16 /dev/tty27 /dev/tty38 /dev/tty49 /dev/tty6
/dev/tty17 /dev/tty28 /dev/tty39 /dev/tty5 /dev/tty60
/dev/tty18 /dev/tty29 /dev/tty4 /dev/tty50 /dev/tty61

3

Hi there, issue noted. Could you please check the “Working with Dynamically Plugged devices” section on this page:

https://www.balena.io/docs/reference/base-images/base-images/#working-with-dynamically-plugged-devicesnce/base-images/base-images/#working-with-dynamically-plugged-devices

which suggests to check the following for your container-

  1. ‘udevd’ is enabled for your container, in the dockerfile or through an environment variable;
  2. your container is being run as ‘privileged’

I think its worth checking these before we progress! Thanks