Chrome OS Version: 64.0.3282.24 (Official Build) dev (64-bit)
Chrome OS Platform: 10176.13.1 (Official Build) dev-channel snappy

Steps To Reproduce:
(1) Boot CrOS
(2) Login as user (also reproducible on guest)
(3) Attach HP Travel Docking station HP USB Travel Docking Station to USBA port of Chromebook
(4) Unplug Docking station
(5) Check output of lsusb; 
(6) Keep repeating steps (3)-(5) until failure is present

Expected Result:
After attaching docking station its all components (especially USB Hubs of docking station USB3 and USB2 part) should be visible by the ChromeOS.
After calling lsusb in crosh I am expecting to see after each replug:
Bus 001 Device 007: ID 048d:1165 Integrated Technology Express, Inc. IT1165 Flash Controller
Bus 002 Device 002: ID 03f0:a01d Hewlett-Packard  <------------- USB3 part of the hub of docking station
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 18d1:5014 Google Inc. 
Bus 001 Device 004: ID 8087:0a2a Intel Corp. 
Bus 001 Device 003: ID 0bda:57d6 Realtek Semiconductor Corp. 
Bus 001 Device 006: ID 03f0:0255 Hewlett-Packard <------------- USB2 part of the hub of docking station
Bus 001 Device 002: ID 046d:c05b Logitech, Inc. M-U0004 810-001317 [B110 Optical USB Mouse]
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Actual Result:
After couple replugs (correct number of replugs is vary) docking station to the Chromebook USB3 part of hub on dokcing station is gone from the system and not present to the user. Actual ouptut of lsusb at failure state:
Bus 001 Device 009: ID 048d:1165 Integrated Technology Express, Inc. IT1165 Flash Controller
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 18d1:5014 Google Inc. 
Bus 001 Device 004: ID 8087:0a2a Intel Corp. 
Bus 001 Device 003: ID 0bda:57d6 Realtek Semiconductor Corp. 
Bus 001 Device 008: ID 03f0:0255 Hewlett-Packard <------------- only USB2 part of the hub of docking station is visible
Bus 001 Device 002: ID 046d:c05b Logitech, Inc. M-U0004 810-001317 [B110 Optical USB Mouse]
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub


How frequently does this problem reproduce? Always

What is the impact to the user, and is there a workaround? 
User is missing all downstreams components attached to the USB3 docking station. As external display(s), Etherenet and Audio part of docking station are connected to USB3 (downstream) port user is missing all of them. This docking station got also exposed USB3 port for the user and any USB device (hi or super speed) is not recognized by the ChromeOS.
Workaround which can be applied is to unbind and bind USB controller; In crosh as root:
cd /sys/bus/pci/drivers/xhci_hcd/
echo -n XXXX\:XX\:XX.X > unbind
echo -n XXXX\:XX\:XX.XC > bind

Please provide any additional information below. Attach a screen shot or
log if possible.
Problem is present on Snappy platform and HP USB Travel Docking Station (P/N 839033-001) for USB3.0 connextivity on both USB3 ports on Chromebook.
Problem is present on Snappy platform and HP USB Travel Docking Station (P/N 839032-001) for USB-C connextivity on both USB-C ports on Chromebook.

Attaching CrOS logs at the moment of failure.

 

Deleted: debug-logs_20171222-094908 81.5 KB

debug-logs_20171222-094908 81.5 KB View Download