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I have an external HDD with a USB 3.0 connection. When I connect it to the USB 3.0 port on my laptop, it works fine but when I eject it, it gets remounted immediately.

This doesn't happen when I connect the same drive to a USB 2.0 port.

At the moment I'm unmounting (clicking the "eject" button in Nautilus) instead.

Is there a way to avoid this issue?

To Do
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  • Does the same thing happen if you eject it via the disks program? (search dash for disks) – Tim Nov 17 '14 at 16:33

1 Answers1

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I've found 3 workarounds:

  1. attached to bug https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/792085 there is an advice to uncheck "Mount removable drives when hot-plugged" setting: https://launchpadlibrarian.net/191200111/Thunar_uncheck_setting.png
  2. edit the BIOS settings: a) set xHCI mode to manual and b) disable the "xHCI pre-boot driver". It seems to solve the problem and supposedly leaves the USB 3.0 mode switched on. I've applied this method but, sorry, haven't tested it thoroughly yet.
  3. a hard and violent workaround: just disable USB 3.0 mode in the BIOS settings - disable the xHCI interface, which is essential to USB 3.0. It helps... Although slows down the USB...
Andy
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  • Option 2 worked for me! Yay! The drive powers down and I still have USB 3.0 power and speed. Hardware is Asus k56ca and SeaGate GoFlex 1.5TB. – wjandrea Jul 30 '16 at 19:25
  • You made my day. Disabling USB 3 support in BIOS fixed this problem in Ubuntu 16.04 Dell Lattitude E6540 :-) – Gobinath Nov 10 '16 at 14:09