Upstream has provided a fix:

commit 91ff70db0c49d22fac1b249bd16949978406c271
Author: Mathias Nyman <>
Date:   Mon Aug 29 14:45:17 2016 +0300

    usb: hub: Fix auto-remount of safely removed or ejected USB-3 devices
    USB-3 does not have any link state that will avoid negotiating a connection
    with a plugged-in cable but will signal the host when the cable is
    For USB-3 we used to first set the link to Disabled, then to RxDdetect to
    be able to detect cable connects or disconnects. But in RxDetect the 
    device is detected again and eventually enabled.
    Instead set the link into U3 and disable remote wakeups for the device.
    This is what Windows does, and what Alan Stern suggested.

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  Safely remove is not working (or broken) in Gnome Disks

Status in GNOME Disks:
  Fix Released
Status in udisks:
Status in gnome-disk-utility package in Ubuntu:
  Fix Released
Status in gnome-disk-utility package in Fedora:
Status in gnome-disk-utility package in openSUSE:
Status in oem-workaround-xhci-quirk-dkms package in openSUSE:
  Fix Released

Bug description:
  In 12.04 I was able to safely remove USB-stick (make its LED off) and USB-HDD 
(do a spin down).
  In 13.04 this option is missed.

  In 13.10 it is appeared again, but not working as expected:
  +    Gnome Disks normally powers off the USB flash (tested on 4 different 
flashes and 2 USB cardreaders).
  -     Gnome Disks does not spin down USB HDD (but udisks --detach does)

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: gnome-disk-utility 3.8.2-1ubuntu2
  ProcVersionSignature: Ubuntu 3.10.0-1.8-generic 3.10.0-rc7
  Uname: Linux 3.10.0-1-generic i686
  NonfreeKernelModules: nvidia
  ApportVersion: 2.12.5-0ubuntu2
  Architecture: i386
  Date: Sat Oct 12 13:39:21 2013
  InstallationDate: Installed on 2013-03-06 (219 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha i386 (20130306)
  MarkForUpload: True
  SourcePackage: gnome-disk-utility
  UpgradeStatus: Upgraded to saucy on 2013-06-23 (110 days ago)

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