[Bug 220284] New: USB4 / Thunderbolt not working after boot until thunderbolt module is reloaded

[Bug 220284] New: USB4 / Thunderbolt not working after boot until thunderbolt module is reloaded

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=220284

            Bug ID: 220284
           Summary: USB4 / Thunderbolt not working after boot until
                    thunderbolt module is reloaded
           Product: Drivers
           Version: 2.5
    Kernel Version: 6.15.3
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: USB
          Assignee: drivers_usb@kernel-bugs.kernel.org
          Reporter: kim.lindberger@gmail.com
        Regression: Yes

Laptop: Lenovo ThinkPad T14s Gen 4, model 21F8CTO1WW (AMD)


When upgrading from 6.15.2 to 6.15.3 my ThinkPad Thunderbolt 4 Dock stopped
working, giving basically no signs of life even when unplugged and replugged.
It doesn't start working again until the thunderbolt module is unloaded and
reloaded while the dock is still connected. If I unload and reload while the
dock is disconnected, nothing happens.

When booting, I can also see

thunderbolt 0000:c5:00.6: probe with driver thunderbolt failed with error -110

in the log, which wasn't printed with prior kernels.

I don't boot with the dock connected.

The issue persist with 6.15.4.

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Re: [Bug 220284] New: USB4 / Thunderbolt not working after boot until thunderbolt module is reloaded

[Alyssa Ross]

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On Fri, Jun 27, 2025 at 05:29:56PM +0000, bugzilla-daemon@kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=220284
>
>             Bug ID: 220284
>            Summary: USB4 / Thunderbolt not working after boot until
>                     thunderbolt module is reloaded
>            Product: Drivers
>            Version: 2.5
>     Kernel Version: 6.15.3
>           Hardware: AMD
>                 OS: Linux
>             Status: NEW
>           Severity: normal
>           Priority: P3
>          Component: USB
>           Assignee: drivers_usb@kernel-bugs.kernel.org
>           Reporter: kim.lindberger@gmail.com
>         Regression: Yes
>
> Laptop: Lenovo ThinkPad T14s Gen 4, model 21F8CTO1WW (AMD)
>
>
> When upgrading from 6.15.2 to 6.15.3 my ThinkPad Thunderbolt 4 Dock stopped
> working, giving basically no signs of life even when unplugged and replugged.
> It doesn't start working again until the thunderbolt module is unloaded and
> reloaded while the dock is still connected. If I unload and reload while the
> dock is disconnected, nothing happens.
>
> When booting, I can also see
>
> thunderbolt 0000:c5:00.6: probe with driver thunderbolt failed with error -110
>
> in the log, which wasn't printed with prior kernels.
>
> I don't boot with the dock connected.
>
> The issue persist with 6.15.4.

#regzbot introduced v6.15.2..v6.15.3 ^
#regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=220284
#regzbot link: https://github.com/NixOS/nixpkgs/issues/420730
#regzbot title USB4 / Thunderbolt not working after boot until thunderbolt module is reloaded

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[Bug 220284] USB4 / Thunderbolt not working after boot until thunderbolt module is reloaded

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=220284

--- Comment #1 from Alyssa Ross (hi@alyssa.is) ---
On Fri, Jun 27, 2025 at 05:29:56PM +0000, bugzilla-daemon@kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=220284
>
>             Bug ID: 220284
>            Summary: USB4 / Thunderbolt not working after boot until
>                     thunderbolt module is reloaded
>            Product: Drivers
>            Version: 2.5
>     Kernel Version: 6.15.3
>           Hardware: AMD
>                 OS: Linux
>             Status: NEW
>           Severity: normal
>           Priority: P3
>          Component: USB
>           Assignee: drivers_usb@kernel-bugs.kernel.org
>           Reporter: kim.lindberger@gmail.com
>         Regression: Yes
>
> Laptop: Lenovo ThinkPad T14s Gen 4, model 21F8CTO1WW (AMD)
>
>
> When upgrading from 6.15.2 to 6.15.3 my ThinkPad Thunderbolt 4 Dock stopped
> working, giving basically no signs of life even when unplugged and replugged.
> It doesn't start working again until the thunderbolt module is unloaded and
> reloaded while the dock is still connected. If I unload and reload while the
> dock is disconnected, nothing happens.
>
> When booting, I can also see
>
> thunderbolt 0000:c5:00.6: probe with driver thunderbolt failed with error
> -110
>
> in the log, which wasn't printed with prior kernels.
>
> I don't boot with the dock connected.
>
> The issue persist with 6.15.4.

#regzbot introduced v6.15.2..v6.15.3 ^
#regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=220284
#regzbot link: https://github.com/NixOS/nixpkgs/issues/420730
#regzbot title USB4 / Thunderbolt not working after boot until thunderbolt
module is reloaded

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[Bug 220284] USB4 / Thunderbolt not working after boot until thunderbolt module is reloaded

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=220284

The Linux kernel's regression tracker (Thorsten Leemhuis) (regressions@leemhuis.info) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |regressions@leemhuis.info

--- Comment #2 from The Linux kernel's regression tracker (Thorsten Leemhuis) (regressions@leemhuis.info) ---
Does the problem still happen with 6.16? 6.15 will be EOL soon anyway.

[Sorry, this fell through the cracks]

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[Bug 220284] USB4 / Thunderbolt not working after boot until thunderbolt module is reloaded

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=220284

Mika Westerberg (mika.westerberg@linux.intel.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mika.westerberg@linux.intel
                   |                            |.com

--- Comment #3 from Mika Westerberg (mika.westerberg@linux.intel.com) ---
Also please attach full dmesg with "thunderbolt.dyndbg=+p" in the kernel
command line.

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