[Bug 218795] New: USB4 / Thunderbolt + AMD: unstable and slow link (many uncorrectable errors)

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=218795

            Bug ID: 218795
           Summary: USB4 / Thunderbolt + AMD: unstable and slow link (many
                    uncorrectable errors)
           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: guilhem@lettron.fr
        Regression: No

Created attachment 306247
  --> https://bugzilla.kernel.org/attachment.cgi?id=306247&action=edit
logs with thunderbolt debug

Context
laptop : Asus UM5302TA
CPU : AMD Ryzen 7 6800U
egpu case : Razer Core X Chroma, thunderbolt 3
GPU : nvidia + opendriver 550.78
Ubuntu 24.04, kernel 6.7 / 6.8 / 6.9

when plugging thunderbolt cable:
```
[...]
pci 0000:35:00.0: 2.000 Gb/s available PCIe bandwidth, limited by 2.5 GT/s PCIe
x1 link at 0000:00:04.1 (capable of 31.504 Gb/s with 8.0 GT/s PCIe x4 link)
[...]
```

```
nvidia 0000:35:00.0: PCIe Bus Error: severity=Uncorrectable (Non-Fatal),
type=Transaction Layer, (Requester ID)
nvidia 0000:35:00.0:   device [10de:2504] error status/mask=00100000/00000000
nvidia 0000:35:00.0:    [20] UnsupReq               (First)
nvidia 0000:35:00.0: AER:   TLP Header: 40001001 0000000c ad08000c f7f7f7f7
```

I tried many cables (tb3, tb4, etc).

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