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

[Berend Dekens]

Public bug reported:

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)

** Affects: brltty (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug oneiric

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

Title:
  brltty daemon prevents creation of ttyUSB0 device link

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