[Bug 1990357] Re: ch340 USB/serial - brltty interference

[Chris Guiver]

Thank you for taking the time to report this bug and helping to make
Ubuntu better.

Please execute the following command only once, as it will automatically
gather debugging information, in a terminal:

apport-collect 1990357

When reporting bugs in the future please use apport by using 'ubuntu-
bug' and the name of the package affected. You can learn more about this
functionality at https://wiki.ubuntu.com/ReportingBugs.

Please note: `ubuntu-bug`, `apport` & bug reporting tools are provided
with Ubuntu by default, many require manual addition for some releases
of downstream OSes based on Ubuntu (eg. Linux Mint). You should check
with your distribution first.

additional note:  If you don't wish to add apport tools to Linux Mint,
please perform it using the Ubuntu live media you mention... Thanks for
helping to make Ubuntu better

** Tags added: jammy

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https://bugs.launchpad.net/bugs/1990357

Title:
  ch340 USB/serial - brltty interference

Status in brltty package in Ubuntu:
  New

Bug description:
  the CH340 does show up in lsusb:
  'Bus 001 Device 005: ID 1a86:7523 QinHeng Electronics CH340 serial converter'

  but does not show up in /dev if brltty is installed on the system.

  Device does show up as /dev/ttyUSB0 after removing brltty and
  rebooting.

  tested systems:
  Ubuntu 22.04.1 (live USB) - problem present
  Linux Mint 21 (fresh install, updated) - problem present

  ubuntu-bug does not recognise brltty as an ubuntu package and thus
  refuses to collect data.

  The CH340 is a very common USB/serial converter chip used in cheap 3D
  printers and microcontroller development boards.

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