Recently i installed Ubuntu 18.04 and started to face a strange issue. while i went to sleep/hibernate mode two of my three USB ports stopped working.

If i restart Ubuntu the USB ports goes back to normal mode.

  • 1
    What is the output of lsusb before and after the sleep – Amith KK Jul 15 '18 at 19:18

This answer from Stack Exchange (slightly enhanced here) has a solution:

Edit /etc/default/grub and find the line containing LINUX_DEFAULT change the line from:



GRUB_CMDLINE_LINUX_DEFAULT="quiet splash usbcore.autosuspend=-1"

Save the file, run sudo update-grub, and reboot.

After using this, you will find:

cat /sys/module/usbcore/parameters/autosuspend

The default value is 2. The kernel parameter changes this value.

Setting the kernel parameter helped me. Now my mice works again, when resuming from suspend.

Suggestion: When USB devices don't work after suspend, you can also reload the driver using the following commands as root:

modprobe -r uhci_hcd
modprobe uhci_hcd

and / or

modprobe -r ehci_hcd
modprobe ehci_hcd
  • This seems to have worked on 18.04.2. – Natetronn Mar 3 '19 at 21:46

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