[Bug 217715] New: USB from Thunderbolt 2 dock disconnects (xHCI host not responding)

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=217715

            Bug ID: 217715
           Summary: USB from Thunderbolt 2 dock disconnects (xHCI host not
                    responding)
           Product: Drivers
           Version: 2.5
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: USB
          Assignee: drivers_usb@kernel-bugs.kernel.org
          Reporter: youp1one1@gmail.com
        Regression: No

System details:

Operating System: openSUSE Tumbleweed                
          Kernel: Linux 6.4.4-1-default
    Architecture: x86-64
 Hardware Vendor: Lenovo
  Hardware Model: ThinkPad P72
Firmware Version: N2CET65W (1.48 )
   Firmware Date: Mon 2022-08-01


I have an old Elgato Thunderbolt 2 dock connected to my laptop's Thunderbolt 3
port via the Apple TB2->TB3 adapter
(https://www.apple.com/shop/product/MMEL2AM/A/thunderbolt-3-usb-c-to-thunderbolt-2-adapter).

I have some USB devices connected to that dock: keyboard, speakers (using USB
audio).
The USB subsystem of the dock randomly disconnects with the following trace:

[50410.012153] xhci_hcd 0000:09:00.0: xHCI host controller not responding,
assume dead
[50410.012191] xhci_hcd 0000:09:00.0: HC died; cleaning up
[50410.012231] usb 5-4: USB disconnect, device number 2

It disconnects randomly less than one hour after fresh boot or hours later,
there is no identifiable pattern. It happens out of the blue while I'm using
the machine normally, usually playing audio to the connected speaker via USB
audio.
Replugging the TB3 cable usually makes USB work again for a while until it
disconnects again. A monitor is connected to this dock via DisplayPort and is
unaffected.
I noticed that issue starting with Kernel 6.3.4, although it could have
happened before.

Here's my initial bug report on openSUSE Tumbleweed issue tracker:
https://bugzilla.opensuse.org/show_bug.cgi?id=1212019

I can provide any additional info required.

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