New: USB4 / Thunderbolt not working after boot until thunderbolt module is reloaded
Subsystems (2)
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: [email protected]
Reporter: [email protected]
Regression: YesLaptop: 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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Quoted 29 lines · On Fri, Jun 27, 2025 at 05:29:56PM +0000, [email protected] 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: [email protected] Reporter: [email protected] Regression: YesLaptop: 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
Quoted 7 lines
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
[Bug 220284] USB4 / Thunderbolt not working after boot until thunderbolt module is reloaded
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=220284
--- Comment #1 from Alyssa Ross ([email protected]) ---
Quoted 29 lines · On Fri, Jun 27, 2025 at 05:29:56PM +0000, [email protected] 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: [email protected] Reporter: [email protected] Regression: YesLaptop: 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
Quoted 8 lines
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
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=220284
The Linux kernel's regression tracker (Thorsten Leemhuis) ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected]
--- Comment #2 from The Linux kernel's regression tracker (Thorsten Leemhuis) ([email protected]) --- 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
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=220284
Mika Westerberg ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected] | |.com
--- Comment #3 from Mika Westerberg ([email protected]) --- Also please attach full dmesg with "thunderbolt.dyndbg=+p" in the kernel command line.
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[Bug 220284] USB4 / Thunderbolt not working after boot until thunderbolt module is reloaded
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=220284
Alyssa Ross ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected]
--- Comment #4 from Alyssa Ross ([email protected]) --- I believe this was fixed.
#regzbot fix: 58d71d4242ce057955c783a14c82270c71f9e1e8
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[Bug 220284] USB4 / Thunderbolt not working after boot until thunderbolt module is reloaded
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=220284
Kim Lindberger ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |CODE_FIX--- Comment #5 from Kim Lindberger ([email protected]) --- Yes, sorry about the late reply. This has been fixed.
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