New: CalDigit TS5+ Thunderbolt rear USB controller fails to enumerate on AMD Strix Point USB4 host
https://bugzilla.kernel.org/show_bug.cgi?id=221510
Bug ID: 221510
Summary: CalDigit TS5+ Thunderbolt rear USB controller fails to
enumerate on AMD Strix Point USB4 host
Product: Drivers
Version: 2.5
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: USB
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Created attachment 310101
--> https://bugzilla.kernel.org/attachment.cgi?id=310101&action=edit
dmesg,lsusb,lspci,tbadm etc debug output
I have a webcam connected to the rear usb hub of the Caldigit TS5+ dock. It fails to enumerate on linux, however it does light up and activate when plugged in. It does work when connected via the front usb port, just not the rear ones.
However, it does work with an ASUS Zephyrus G14 (GA403UV, Ryzen 9 8945HS, Hawk Point) running Windows.
I did see this in the dmesg logs at one point while testing: "usb usb4: We don't know the algorithms for LPM for this host, disabling LPM".
Kernels tested: 6.12.82 and 6.19.13 (NixOS 25.11)
Hardware
* Laptop: Lenovo ThinkPad T14s Gen 6 AMD (21M1CTO1WW / 21M1CTO1WWUS1)
* CPU: AMD Ryzen AI 7 PRO 360 w/ Radeon 880M (Strix Point, Zen 5)
* Dock: CalDigit TS5 Plus
Steps to reproduce:
1. Boot Linux on a ThinkPad T14s Gen 6 AMD with the TS5 Plus connected via Thunderbolt.
2. Plug a USB-C device (tested: Insta360 Link 2 webcam, idVendor 2e1a, idProduct 4c04) into any of the three rear USB-C ports on the dock.
3. Observe: device receives power but does not enumerate. dmesg shows no events. lsusb and v4l2-ctl don't list the device.
Expected behavior: Device enumerates and is usable, as it does when plugged into the front USB-C port on the same dock.
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[Bug 221510] CalDigit TS5+ Thunderbolt rear USB controller fails to enumerate on AMD Strix Point USB4 host
https://bugzilla.kernel.org/show_bug.cgi?id=221510
Mika Westerberg ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected] | |.com
--- Comment #1 from Mika Westerberg ([email protected]) --- Please remove "pcie_aspm=off" in the kernel command line. That effectively turns off native PCIe support so definitely has an effect on any TB devices. After you have done that then try to repro again and if it does repro then attach full dmesg with "thunderbolt.dyndbg=+p" added to the command line.
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[Bug 221510] CalDigit TS5+ Thunderbolt rear USB controller fails to enumerate on AMD Strix Point USB4 host
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=221510
Andrew ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |CODE_FIX--- Comment #2 from Andrew ([email protected]) --- That fixed it, thank you. All the usb controllers enumerate now.
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