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[Alberto Salvia Novella <es20490446e@xxxxxxxxx>]

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1528240

Title:
  USB 3.0 hub has no power when USB storage device is plugged

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  lsb_release -rd

  Description:	Ubuntu 15.10
  Release:	15.10

  linux-image-4.2.0-17-generic

  When I plug USB 3.0 storage device(Transcend TS32GJF780 USB 3.0 32 Gb
  flash drive) into one of USB 3.0 ports in USB hub (DELL U2713HM
  monitor) and hub is connected to USB 3.0 port on my MB - no USB device
  is detected. lsusb shows no device is connected to hub ports:

  lsusb -t
  /:  Bus 06.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
      |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M
          |__ Port 2: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
          |__ Port 6: Dev 4, If 0, Class=Video, Driver=uvcvideo, 480M
          |__ Port 6: Dev 4, If 1, Class=Video, Driver=uvcvideo, 480M
          |__ Port 6: Dev 4, If 2, Class=Audio, Driver=snd-usb-audio, 480M
          |__ Port 6: Dev 4, If 3, Class=Audio, Driver=snd-usb-audio, 480M
  /:  Bus 05.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
      |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M
          |__ Port 3: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
  /:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
      |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 5000M
  /:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
      |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
  /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
  /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M

  Expected: hub device on Bus 04/Port1 has storage device listed.

  Workaround: if I check if power is supplied to the USB 3.0 hub device,
  I see:

  cat /sys/bus/usb/devices/usb4/4-1/power/control
  auto

  Then if I manually turn power on:

  echo on >/sys/bus/usb/devices/usb4/4-1/power/control

  USB 3.0 device appears and works. 
  This problem is not reproducible if the same USB hub is attached to USB 2.0 port, so it is likely to be USB XHCI driver problem.
  --- 
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  dad        3733 F.... pulseaudio
   /dev/snd/controlC1:  dad        3733 F.... pulseaudio
   /dev/snd/controlC0:  dad        3733 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 15.10
  HibernationDevice: RESUME=UUID=ec75df3c-6d00-4f8f-b472-329453228f6c
  InstallationDate: Installed on 2015-01-18 (336 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  MachineType: System manufacturer System Product Name
  NonfreeKernelModules: nvidia_modeset nvidia
  Package: linux (not installed)
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-17-generic root=UUID=299f7f51-d713-41f7-9a41-8603a94788d4 ro quiet splash
  ProcVersionSignature: Ubuntu 4.2.0-17.21-generic 4.2.3
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-17-generic N/A
   linux-backports-modules-4.2.0-17-generic  N/A
   linux-firmware                            1.149.3
  RfKill:
   
  Tags:  wily
  Uname: Linux 4.2.0-17-generic x86_64
  UpgradeStatus: Upgraded to wily on 2015-12-19 (1 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo video
  _MarkForUpload: True
  dmi.bios.date: 05/06/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 4701
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: P9X79
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4701:bd05/06/2014:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP9X79:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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