no such file as *brltty.rules" in my udev. What I did that seems to work
is:

sudo systemctl stop brltty-udev.service
sudo systemctl mask brltty-udev.service
sudo systemctl stop brltty.service
sudo systemctl disable brltty.service

Not sure if this is best or even a good idea but at least it stops
brltty from stealing my serial port. Since I don't use brltty it does
not hurt me that brltty can't coexist with my CH340 serial port.

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to brltty in Ubuntu.
https://bugs.launchpad.net/bugs/1990189

Title:
  brlttty claiming CH341 usbtty device blocking access

Status in brltty package in Ubuntu:
  New

Bug description:
  While this problem seems to have been fixed for FTDI and CP210 based
  devices CH340/CH341 based (and possibly other USB serial adapters) are
  unusable except by brltty.

  [139099.253351] usb 1-2.1.2: new full-speed USB device number 17 using 
xhci_hcd
  [139099.370766] usb 1-2.1.2: New USB device found, idVendor=1a86, 
idProduct=7523, bcdDevice= 2.63
  [139099.370777] usb 1-2.1.2: New USB device strings: Mfr=0, Product=2, 
SerialNumber=0
  [139099.370782] usb 1-2.1.2: Product: USB2.0-Serial
  [139099.414885] ch341 1-2.1.2:1.0: ch341-uart converter detected
  [139099.429265] usb 1-2.1.2: ch341-uart converter now attached to ttyUSB0
  [139100.045076] input: BRLTTY 6.4 Linux Screen Driver Keyboard as 
/devices/virtual/input/input24
  [139100.782817] usb 1-2.1.2: usbfs: interface 0 claimed by ch341 while 
'brltty' sets config #1
  [139100.786100] ch341-uart ttyUSB0: ch341-uart converter now disconnected 
from ttyUSB0
  [139100.786136] ch341 1-2.1.2:1.0: device disconnected
  [143917.740171] usb 1-2.1.2: USB disconnect, device number 17

  DISTRIB_ID=Ubuntu
  DISTRIB_RELEASE=22.04
  DISTRIB_CODENAME=jammy
  DISTRIB_DESCRIPTION="Ubuntu 22.04.1 LTS"

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: brltty 6.4-4ubuntu3
  ProcVersionSignature: Ubuntu 5.15.0-47.51-generic 5.15.46
  Uname: Linux 5.15.0-47-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.1
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: MATE
  Date: Mon Sep 19 12:01:21 2022
  InstallationDate: Installed on 2022-08-23 (27 days ago)
  InstallationMedia: Ubuntu-MATE 22.04.1 LTS "Jammy Jellyfish" - Release amd64 
(20220809.1)
  ProcEnviron:
   LANGUAGE=en_US
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: brltty
  UpgradeStatus: No upgrade log present (probably fresh install)

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