Indeed, lots of USB port resets in
https://launchpadlibrarian.net/176813239/CurrentDmesg.txt. I suppose the
port that the hub is connected to is simply unable to provide enough
power for all devices on the hub, or there is a bad USB cable or other
hardware problem. Please try the USB device on a different USB port
that's connected directly to the computer; if the device has its own
power supply, try a different cable, or a different hub to isolate the
problem?

** Changed in: systemd (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1325757

Title:
  USB Hub does not mount the USB devices

Status in “systemd” package in Ubuntu:
  Invalid

Bug description:
  USB Hub doesn't mount the USB devices correctly. The Hub mounts some
  devices, does not mounts another and I can not insert another USB Hub
  inside it and agreegate USB ports. The system does not mount correctly
  and accurately the USB devices when using USB hubs. This is the bug.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: udev 204-5ubuntu20.2
  ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
  Uname: Linux 3.13.0-27-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Mon Jun  2 19:01:14 2014
  GvfsMonitorLog: Monitoring events. Press Ctrl+C to quit.
  HotplugNewDevices: /dev/sde1 /dev/sde
  HotplugNewMounts:
   
  InstallationDate: Installed on 2014-05-30 (3 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: System manufacturer System Product Name
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-27-generic 
root=UUID=cd35f223-f2ea-4470-b8d1-014a6008deb8 ro locale=pt_BR quiet splash 
vt.handoff=7
  SourcePackage: systemd
  Symptom: storage
  Title: Removable storage device not detected as block device
  UdisksMonitorLog:
   Monitoring the udisks daemon. Press Ctrl+C to exit.
   19:01:39.045: The udisks-daemon is running (name-owner :1.68).
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/01/2011
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0502
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: M5A78L-M LX/BR
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr0502:bd12/01/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM5A78L-MLX/BR:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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