[Bug 874181] Re: brltty daemon prevents creation of ttyUSB0 device link

[ironfisher]

This is solved by uninstalling "brltty" as posted in this question
(https://answers.launchpad.net/ubuntu/+question/5503) So, you should do
this:

sudo apt-get uninstall brltty

This problem is happening again in Ubuntu 11.10 with Xilinx ML605
developtment board.

Something must be done because this is not normal. It's really annoying
having to figure out what the problem is every time you use a USB UART
device. And even more annoying to find the problem and find this
solution.

I took me about 4 hours to find and solve this problem, even I am
related to computers, Ubuntu and Linux. Imagine how annoying it is for
anyone not related to linux and how many devices using UART through USB
there are.

Let's deactivate BRLTTY default or contact with BRLTTY developers to not
claim the USB interface by default.

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https://bugs.launchpad.net/bugs/874181

Title:
  brltty daemon prevents creation of ttyUSB0 device link

Status in “brltty” package in Ubuntu:
  Confirmed

Bug description:
  After upgrading from Ubuntu 11.04 to 11.10, I no longer found a
  '/dev/ttyUSB0' for my serial-to-USB converter. The device is part of a
  Xilinx FPGA board and is a "10c4:ea60 Cygnal Integrated Products, Inc.
  CP210x Composite Device".

  Every time I plugged in the device, dmesg showed the device coming up
  and 'brltty' did *something* to it. At this point, no device was
  present in '/dev'.

  [ 5181.130942] cp210x 1-1.4:1.0: cp210x converter detected
  [ 5181.203658] usb 1-1.4: reset full speed USB device number 5 using ehci_hcd
  [ 5181.296637] usb 1-1.4: cp210x converter now attached to ttyUSB0
  [ 5181.623749] usb 1-1.4: usbfs: interface 0 claimed by cp210x while 'brltty' sets config #1

  After removing 'brltty', the '/dev/ttyUSB0' device appears again like
  it used to.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: brltty (not installed)
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 1.23-0ubuntu3
  Architecture: amd64
  Date: Fri Oct 14 14:39:29 2011
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  ProcEnviron:
   LANGUAGE=
   LC_TIME=C
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: brltty
  UpgradeStatus: Upgraded to oneiric on 2011-10-13 (0 days ago)

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