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New: Regression: Thunderbolt 3 Dock USB not working when connecting it for the second time

Bug 206603 [email protected] 1 participant 2 messages Feb 19, 2020 – Dec 8, 2020 USB

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https://bugzilla.kernel.org/show_bug.cgi?id=206603

            Bug ID: 206603
           Summary: Regression: Thunderbolt 3 Dock USB not working when
                    connecting it for the second time
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.4.12
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: USB
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Created attachment 287515
--> https://bugzilla.kernel.org/attachment.cgi?id=287515&action=edit
kernel-5.4.10-200.fc31.x86_64.log

I did submit this bug to the Fedora bug tracker in January. Since the latest update this is now happening on Ubuntu too, which is why I'm now submitting this to the Kernel bug tracker.

Bug at Red Hat Bugzilla for reference:
https://bugzilla.redhat.com/show_bug.cgi?id=1790889

---

I'm using this Thunderbolt 3 Dock together together with my ThinkPad T480s:

https://i-tec.cz/de/produkt/tb3hdmidock-3/ (P/N TB3HDMIDOCK)
https://web.archive.org/web/20180929103728/https://i-tec.cz/de/produkt/tb3hdmidock-3/

It contains HDMI and USB outputs.

When connecting the Dock for the second time after boot (boot, plug, unplug, and plug again), USB devices connected to
the Dock are not working (at least I've tried keyboard, mouse and mass storage devices).
The HDMI output continues to work.

This did work before using the following kernel versions:

- 5.4.7-200.fc31 (Fedora)
- 5.3.0-29-generic (Ubuntu)

When upgrading the Kernel, it breaks:

- 5.4.7-200.fc31 (Fedora)
- 5.3.0-40-generic (Ubuntu)

Both Fedora and Ubuntu keep old Kernel versions for a while. I can still boot one of the older kernels and then the bug is not happening.

Steps to reproduce:

1. Boot Notebook
2. Connect Dock
(HDMI and USB devices connected to the Dock are now working.)
3. Disconnect Dock
4. Connect Dock again
(HDMI device connected to the Dock is now working again, USB devices connected to the Dock are not working until reboot.)

This is from the kernel log:

Quoted 10 lines
Jan 14 08:04:48 kernel: Registered IR keymap rc-cec
Jan 14 08:04:48 kernel: rc rc0: DP-1 as
/devices/pci0000:00/0000:00:02.0/rc/rc0
Jan 14 08:04:48 kernel: input: DP-1 as
/devices/pci0000:00/0000:00:02.0/rc/rc0/input38
Jan 14 08:04:48 kernel: typec_displayport port1-partner.0: failed to enter
mode
Jan 14 08:04:48 kernel: thunderbolt 0-1: new device found, vendor=0x16b
device=0x9003
Jan 14 08:04:48 kernel: thunderbolt 0-1: ComDis TB3HDMIDOCK

Full log is attached.

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#1 lore raw

[Bug 206603] Regression: Thunderbolt 3 Dock USB not working when connecting it for the second time

https://bugzilla.kernel.org/show_bug.cgi?id=206603

Wayne ([email protected]) changed:

What |Removed |Added
----------------------------------------------------------------------------

             Status|NEW                         |RESOLVED
         Resolution|---                         |PATCH_ALREADY_AVAILABLE

--- Comment #2 from Wayne ([email protected]) ---
I tried again today and I'm no longer able to reproduce the problem (using Linux 5.8 now). Closing.

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