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[Malaise <malaise@xxxxxxxx>]

Here we are for the status when detection fails.
Note in dmesg that detection is OK, then
[   16.737128] usb 2-7: Device not responding to set address.
[   16.940835] usb 2-7: device not accepting address 5, error -71
then finally
[   20.827527] xhci_hcd 0000:00:14.0: HC died; cleaning up
[   20.827578] usb 2-3: USB disconnect, device number 2
[   21.051448] usb 2-6: USB disconnect, device number 3
[   21.099604] usb 2-7: USB disconnect, device number 6


** Attachment added: "dmesg"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1476783/+attachment/4432165/+files/dmesg

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https://bugs.launchpad.net/bugs/1476783

Title:
  Lenovo B5970 USB peripherals are not detected

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Randomly (around twice any 3 reboot), Linux does not detect the USB peripherals of the laptop.
  When everything is ok, lsusb:
  Bus 001 Device 002: ID 8087:8000 Intel Corp. 
  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
  Bus 002 Device 004: ID 0cf3:3004 Atheros Communications, Inc. 
  Bus 002 Device 003: ID 0bda:579c Realtek Semiconductor Corp. 
  Bus 002 Device 002: ID 1d57:32da Xenta 2.4GHz Receiver (Keyboard and Mouse)
  Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

  When it fails:
  Bus 001 Device 002: ID 8087:8000 Intel Corp. 
  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
  Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

  I will complete the report with dmesg,  lspci -vnvn, lsusb -vv

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-57-generic 3.13.0-57.95
  ProcVersionSignature: Ubuntu 3.13.0-57.95-generic 3.13.11-ckt21
  Uname: Linux 3.13.0-57-generic i686
  ApportVersion: 2.14.1-0ubuntu3.11
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  malaise    2738 F.... pulseaudio
   /dev/snd/controlC0:  malaise    2738 F.... pulseaudio
  CurrentDesktop: XFCE
  Date: Tue Jul 21 20:08:23 2015
  HibernationDevice: RESUME=UUID=004a57bf-beb5-45f9-9b2a-bccf3e83991e
  InstallationDate: Installed on 2015-06-24 (26 days ago)
  InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release i386 (20140416.2)
  MachineType: LENOVO 80EU
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-57-generic root=UUID=03a12f82-eda0-42a9-8bb7-0e07b73a894c ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-57-generic N/A
   linux-backports-modules-3.13.0-57-generic  N/A
   linux-firmware                             1.127.13
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/21/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 9DCN29WW(V2.09)
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Lenovo B50-70
  dmi.board.vendor: LENOVO
  dmi.board.version: 31900058WIN
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo B50-70
  dmi.modalias: dmi:bvnLENOVO:bvr9DCN29WW(V2.09):bd11/21/2014:svnLENOVO:pn80EU:pvrLenovoB50-70:rvnLENOVO:rnLenovoB50-70:rvr31900058WIN:cvnLENOVO:ct10:cvrLenovoB50-70:
  dmi.product.name: 80EU
  dmi.product.version: Lenovo B50-70
  dmi.sys.vendor: LENOVO

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