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[Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>]

Note that for Trusty, it's fixed in  3.13.0-35.62

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https://bugs.launchpad.net/bugs/1345895

Title:
  [Dell Inspiron 3541] USB3 stick speed drop to 480M after first use

Status in HWE Next Project:
  New
Status in “linux” package in Ubuntu:
  Fix Released

Bug description:
  CID: 201403-14859 Dell Inspiron 3541

  The USB3 speed is 5000M when the first time you insert it after boot:

  ubuntu@201403-14859:~$ lsusb -t
  /:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
      |__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
  /:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
  /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
      |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
          |__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=rts5139, 480M
          |__ Port 2: Dev 6, If 0, Class=Wireless, Driver=btusb, 12M
          |__ Port 2: Dev 6, If 1, Class=Wireless, Driver=btusb, 12M
          |__ Port 4: Dev 5, If 0, Class=Video, Driver=uvcvideo, 480M
          |__ Port 4: Dev 5, If 1, Class=Video, Driver=uvcvideo, 480M
  /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
      |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M

  But if you remove it and plug it to the same USB3 port again, it will drop to 480M:
  ubuntu@201403-14859:~$ lsusb -t
  /:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
  /:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
      |__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 480M
  /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
      |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
          |__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=rts5139, 480M
          |__ Port 2: Dev 6, If 0, Class=Wireless, Driver=btusb, 12M
          |__ Port 2: Dev 6, If 1, Class=Wireless, Driver=btusb, 12M
          |__ Port 4: Dev 5, If 0, Class=Video, Driver=uvcvideo, 480M
          |__ Port 4: Dev 5, If 1, Class=Video, Driver=uvcvideo, 480M
  /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
      |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-24-generic 3.13.0-24.46 [modified: boot/vmlinuz-3.13.0-24-generic]
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ubuntu     1660 F.... pulseaudio
   /dev/snd/controlC0:  ubuntu     1660 F.... pulseaudio
  CRDA:
   country TW:
   	(2402 - 2472 @ 40), (3, 27)
   	(5270 - 5330 @ 40), (3, 17), DFS
   	(5735 - 5815 @ 40), (3, 30)
  CurrentDesktop: Unity
  Date: Thu Jul 17 02:51:28 2014
  HibernationDevice: RESUME=UUID=43272c2a-1a8c-404b-8b62-9c6b53e1a765
  InstallationDate: Installed on 2014-07-16 (0 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: Dell Inc. Inspiron 3541
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=4f3d06a7-1106-40c0-a15b-0657fd66a382 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  StagingDrivers: rts5139
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/20/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A00
  dmi.board.name: Inspiron 3541
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvrA00:bd03/20/2014:svnDellInc.:pnInspiron3541:pvrNotSpecified:rvnDellInc.:rnInspiron3541:rvrA00:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: Inspiron 3541
  dmi.product.version: Not Specified
  dmi.sys.vendor: Dell Inc.

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