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

[ihor lys]

This bug still exists even for recent installations of 22.04 LTS.  Thats
not actually surprising, but the path needed to create this bug is.

Capturing the serial converter USB device generically as has been shown,
is a MAJOR breakdown of proper etiquette at least, and a don't care
attitude on the part of the Braille device manufacturers, those writing
of the udev rules, and those allowing that into the distributions.  This
was a coordinated effort amongst multiple people to ignore at least best
practices in the name of "accessibility".  I can only imagine what could
be done if someone wanted to be malicious.

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Title:
  ch340 USB/serial - brltty interference

Status in brltty package in Ubuntu:
  Confirmed

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.
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu82.1
  Architecture: amd64
  CasperMD5json: {
  CurrentDesktop: X-Cinnamon
  DistroRelease: Linux Mint 21
  InstallationDate: Installed on 2022-09-20 (0 days ago)
  InstallationMedia: Linux Mint 21 "Vanessa" - Release amd64 20220726
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  Package: brltty 6.4-4ubuntu3 [origin: Ubuntu]
  PackageArchitecture: amd64
  ProcVersionSignature: Ubuntu 5.15.0-48.54-generic 5.15.53
  Tags: third-party-packages vanessa
  Uname: Linux 5.15.0-48-generic x86_64
  UnreportableReason: This does not seem to be an official Linux package. Please retry after updating the indexes of available packages, if that does not work then remove related third party packages and try again.
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dialout dip input lpadmin plugdev sambashare sudo
  _MarkForUpload: True

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