Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: brltty (Ubuntu)
Status: New => Confirmed
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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
Status in brltty source package in Oneiric:
Fix Released
Bug description:
Impact:
This bug is somewhat hardware specific, affecting all users of the USB serial
controller, device 10c4:ea60.
Test case:
With the current version of brltty in Oneiric, brltty takes over any device
using the above mentioned USB serial controller, whether it is a Braille
display or not. This is because one of Brltty's supported displays uses this
USB serial control internally for ocmmunication. The brltty package in
oneiric-proposed has the udev rule for this controller commented out, allowing
other users of devices based on this controller to work properly.
Regression potential:
All users of the supported Seika will have to load Brltty manually, as the
udev rule for their device is commented out, to allow other USB serial
controller users to use their device as a proper serial device.
Original description follows:
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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