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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.

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  • 1
    What is the output of lsusb before and after the sleep – Amith KK Jul 15 '18 at 19:18
6

This answer from Unix & Linux Stack Exchange (slightly enhanced here) has a solution.

  1. Edit /etc/default/grub and find the line containing LINUX_DEFAULT. Change the line from:

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
    

    to:

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash usbcore.autosuspend=-1"
    
  2. Save the file, run sudo update-grub, and reboot.

  3. After using this, you will find:

    $ cat /sys/module/usbcore/parameters/autosuspend
    -1
    

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

Setting the kernel parameter helped me. Now my mouse 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
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  • This seems to have worked on 18.04.2. – Natetronn Mar 3 '19 at 21:46
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The accepted answer did not work for me and I also don't want to keep up with kernel parameters whenever I reinstall or update grub or boot from another os or whatever. There is a file called usbreset that installs along with usbutils. Run that, find the name of the device you want to restart upon wake and put a file into /lib/systemd/system-sleep I call mine reset-mouse so my file is /lib/systemd/system-sleep/reset-mouse.

If you have that folder, just look at another entry for the format. Mine is:

#!/bin/sh

case $1 in
  post)
    usbreset "Wireless Device"
    ;;
esac

I got the name "Wireless Device" by running usbreset from terminal which will also list your devices and tell their name, so whatever device you have a problem with.

sudo chmod +x /lib/systemd/system-sleep/reset-mouse

Then next time my machine went to sleep, and every time after that, it wakes up immediately with no USB issue.

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