Tomáš Pospíšek's Notizblock

Resetting USB Bus and rescanning Devices

Sometimes, when I plug in my TrekStor external USB drive into my computer, it just won't show up.

The solution is to "rebind" the driver (I guess) to the USB bus:

$ ls /sys/bus/pci/drivers/xhci_hcd/
0000:19:00.0  bind  module  new_id  remove_id  uevent  unbind
# echo 0000:19:00.0 > /sys/bus/pci/drivers/xhci_hcd/unbind
# echo 0000:19:00.0 > /sys/bus/pci/drivers/xhci_hcd/bind

Now my storage shows up properly on the usb bus:

$ lsusb -t
 /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
     |__ Port 2: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 480M

I found the solution via the blog. Many thanks to Zedt.

Tomáš Pospíšek, 2017-09-16