Bug 218795 - USB4 / Thunderbolt + AMD: unstable and slow link (many uncorrectable errors)
Summary: USB4 / Thunderbolt + AMD: unstable and slow link (many uncorrectable errors)
Status: NEW
Alias: None
Product: Drivers
Classification: Unclassified
Component: USB (show other bugs)
Hardware: All Linux
: P3 normal
Assignee: Default virtual assignee for Drivers/USB
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2024-04-30 11:41 UTC by Guilhem Lettron
Modified: 2024-04-30 11:41 UTC (History)
0 users

See Also:
Kernel Version:
Subsystem:
Regression: No
Bisected commit-id:

Attachments
logs with thunderbolt debug (72.08 KB, text/plain)
2024-04-30 11:41 UTC, Guilhem Lettron 		Details
Add an attachment (proposed patch, testcase, etc.)

Description Guilhem Lettron 2024-04-30 11:41:54 UTC 
Created attachment 306247 [details]
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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