[BRLTTY] brltty daemon prevents creation of ttyUSB0 device link

[Samuel Thibault]

Hello,

Yet another issue with a braille device using the same ID as a serial
converter. The Seika driver is the culprit here, stealing 0x10c4:ea60
devices.

This kind of bug is really a concern. Ideally distros should be able to
autostart brltty when a USB braille device is plugged in. If braille
manufacturers don't take care of using their own IDs, there is no way we
can achieve that without hitting people using such serial converters...

Samuel

----- Forwarded message from Berend Dekens <874181 at bugs.launchpad.net> -----

From: Berend Dekens <874181 at bugs.launchpad.net>
To: samuel.thibault at ens-lyon.org
Subject: [Bug 874181] [NEW] brltty daemon prevents creation of ttyUSB0 device link
Reply-To: Bug 874181 <874181 at bugs.launchpad.net>

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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Title:
  brltty daemon prevents creation of ttyUSB0 device link

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----- End forwarded message -----

-- 
Samuel
mdiym42: note to self
mdiym42: make sure your cat is not sleeping in the bass drum before you start playing them