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[Ludovic Rousseau <ludovic.rousseau@xxxxxxxxx>]

Why do you think it is a libusb hotplug bug?

What bugs _exactly_ are you referring too?

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https://bugs.launchpad.net/bugs/1406255

Title:
  Several NFC readers do not initialize properly due to pcsclite bug

Status in pcsc-lite package in Ubuntu:
  New

Bug description:
  Several NFC readers do not work properly due to pcsclite bug (in
  libusb hotplug). Bugs were fixed in version 1.8.13, but Trusty uses
  old 1.8.10 version.

  http://anonscm.debian.org/viewvc/pcsclite/trunk/PCSC/ChangeLog?view=co

  
  pcscd logs:

  1. Reader ACS122U:
  42850162 hotplug_libudev.c:269:get_driver() Looking for a driver for VID: 0x072F, PID: 0x2200, path: /dev/bus/usb/001/019
  00000012 hotplug_libudev.c:321:HPAddDevice() Adding USB device: ACS ACR122U
  00000026 readerfactory.c:989:RFInitializeReader() Attempting startup of ACS ACR122U 00 00 using /usr/lib/pcsc/drivers/ifd-acsccid.bundle/Contents/Linux/libacsccid.so
  00000104 readerfactory.c:874:RFBindFunctions() Loading IFD Handler 3.0
  00000020 ifdhandler.c:2577:init_driver() Driver version: 1.1.0
  00000176 ifdhandler.c:2594:init_driver() LogLevel: 0x0003
  00000005 ifdhandler.c:2605:init_driver() DriverOptions: 0x0000
  00000004 ifdhandler.c:2613:init_driver() ACSDriverOptions: 0x0003
  00000004 ifdhandler.c:2621:init_driver() ACR38CardVoltage: 0
  00000004 ifdhandler.c:2629:init_driver() ACR38CardType: 0
  00000029 ifdhandler.c:104:CreateChannelByNameOrChannel() Lun: 0, device: usb:072f/2200:libudev:0:/dev/bus/usb/001/019
  00000013 ccid_usb.c:307:OpenUSBByName() Using: /usr/lib/pcsc/drivers/ifd-acsccid.bundle/Contents/Info.plist
  00000159 ccid_usb.c:325:OpenUSBByName() ifdManufacturerString: Advanced Card Systems Ltd.
  00000004 ccid_usb.c:326:OpenUSBByName() ifdProductString: ACS CCID driver
  00000003 ccid_usb.c:327:OpenUSBByName() Copyright: This driver is protected by terms of the GNU Lesser General Public License version 2.1, or (at your option) any later version.
  00003508 ccid_usb.c:680:OpenUSBByName() Can't claim interface 1/19: -6
  00000017 ccid_usb.c:214:close_libusb_if_needed() libusb_exit
  00004646 ifdhandler.c:140:CreateChannelByNameOrChannel() failed
  00000015 readerfactory.c:1020:RFInitializeReader() Open Port 0x200000 Failed (usb:072f/2200:libudev:0:/dev/bus/usb/001/019)
  00000008 readerfactory.c:312:RFAddReader() ACS ACR122U init failed.
  00000009 readerfactory.c:535:RFRemoveReader() UnrefReader() count was: 1
  00000009 readerfactory.c:1040:RFUnInitializeReader() Attempting shutdown of ACS ACR122U 00 00.
  00000008 readerfactory.c:911:RFUnloadReader() Unloading reader driver.
  00000070 hotplug_libudev.c:391:HPAddDevice() Failed adding USB device: ACS ACR122U

  
  2. Reader SCL3711:
  04276562 hotplug_libudev.c:269:get_driver() Looking for a driver for VID: 0x04E6, PID: 0x5591, path: /dev/bus/usb/001/018
  00000011 hotplug_libudev.c:321:HPAddDevice() Adding USB device: SCL3711 Reader and NFC Device
  00000027 readerfactory.c:989:RFInitializeReader() Attempting startup of SCL3711 Reader and NFC Device 00 00 using /usr/lib/pcsc/drivers/SCx371x.bundle/Contents/Linux/libSCx371x.so.2.18
  00000124 readerfactory.c:874:RFBindFunctions() Loading IFD Handler 3.0
  Loading lib v2.18 
  00049066 readerfactory.c:1020:RFInitializeReader() Open Port 0x200000 Failed (usb:04e6/5591:libudev:0:/dev/bus/usb/001/018)
  00000012 readerfactory.c:312:RFAddReader() SCL3711 Reader and NFC Device init failed.
  00000004 readerfactory.c:535:RFRemoveReader() UnrefReader() count was: 1
  00000004 readerfactory.c:1040:RFUnInitializeReader() Attempting shutdown of SCL3711 Reader and NFC Device 00 00.
  00000003 readerfactory.c:911:RFUnloadReader() Unloading reader driver.
  00000034 hotplug_libudev.c:391:HPAddDevice() Failed adding USB device: SCL3711 Reader and NFC Device

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: libpcsclite1 1.8.10-1ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
  Uname: Linux 3.13.0-43-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  Date: Tue Dec 30 13:38:53 2014
  Dependencies:
   gcc-4.9-base 4.9.1-0ubuntu1
   libc6 2.19-0ubuntu6.4
   libgcc1 1:4.9.1-0ubuntu1
   multiarch-support 2.19-0ubuntu6.4
  InstallationDate: Installed on 2014-10-14 (76 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=pl_PL.UTF-8
   SHELL=/bin/bash
  SourcePackage: pcsc-lite
  UpgradeStatus: No upgrade log present (probably fresh install)

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