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thiagozs/ubuntu-usb-disable-usb-autosuspend.md

Created July 10, 2024 13:42
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Ubuntu disable USB autosuspend
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ubuntu-usb-disable-usb-autosuspend.md

Disabling USB Auto-Suspend on Ubuntu

These days Linux supports a lot of devices. However, occasionally you will find a device that works but only for a while, requiring a reboot to work again. This is often due to the device itself not behaving according to the USB standard, and that's more often than not caused by misbehaving USB suspend.

The proper way of fixing this would be either a workaround in the driver or, God forbid, a fix in the device's firmware. But quite often nobody does anything, so what's left is to do the improper. And the easiest improper fix is to disable USB autosuspend.

For the command line, just add usbcore.autosuspend=-1 to GRUB_CMDLINE_LINUX_DEFAULT:

sudo sed -i 's/GRUB_CMDLINE_LINUX_DEFAULT="[a-z ]*/& usbcore.autosuspend=-1/' /etc/default/grub
sudo update-grub2
reboot

Once the system is up, you can check that the value is indeed -1 (disabled).

cat /sys/module/usbcore/parameters/autosuspend
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