[Bug 237666] repeated messages of "uhub_reattach_port: giving up port reset - device vanished"

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=237666

Mohammad Noureldin <mohammad at thelightbird.com> changed:

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                 CC|                            |mohammad at thelightbird.com

--- Comment #170 from Mohammad Noureldin <mohammad at thelightbird.com> ---
(In reply to Hans Petter Selasky from comment #169)
Hi HPS,

I came to know about this issue from this mail thread [1]. I went through all
the comments mentioned here and given the comments form both tech-lists and
Gerard Seibert, starting from here [2], I did this analysis:


Mike Karels => Gigabyte MB => GA-X99P-SLI (rev. 1.0)
Gerard Seibert => Dell XPS 8930 => 0T2HR0
tech-lists => Supermincro MB => X9DRE-TF+/X9DR7-TF+

Possible Root Causes:
---------------------
- Having a mix of USB 2.0, USB 3.0 and USB 3.x ?

- Chipsets ?
-# Gigabyte (GA-X99P-SLI (rev. 1.0))
-#- C610: Server and Workstation/X99 Highend Desktop (HEDT)

-# Dell XPS 8930 (0T2HR0, Version: A01)
-#- 200 Series (Including X299 Successor of X99) (HEDT) /Z370 (DT)

-# Supermicro X9DRE-TF+
-#- Intel C602J chipset a variant of C600 (Server and Workstation)/X79
(Predecessor of X99)

-# Supermicro X9DR7-TF+
-#- Intel C602J chipset a variant of C600 (Server and Workstation)/X79
(Predecessor of X99)


>From what I could notice (given my limited experience I have to say), these are
the common details amongst all reported cases so far.

Trying to test the 1st possible root cause (Having a mix of USB 2.0, USB 3.0
and USB 3.x ?), I ran tests on:

Lenovo Thinkpad W540:
---------------------
Chipset: Mobile Intel QM87 Express (having USB 2.0 and USB 3.0)


I tried different USB UEFI Setup Configurations, but I didn't see any of the
errors mentioned.

That lead me to the path that it could be a mix of both Possible Root Causes,
hence I did a bit of research and I've found these 2 machines available for
purchase:


Dell XPS 8920:
--------------
Chipset: Intel Z270
    =>
https://www.dell.com/support/manuals/nl-nl/xps-8920-desktop/xps-8920-setup-and-specifications/system-information?guid=guid-eb144d9a-c8d8-45b8-bab5-9399c3eafb16&lang=en-us
    =>
https://www.dell.com/support/manuals/nl-nl/xps-8920-desktop/xps-8920-setup-and-specifications/poorten-en-connectoren?guid=guid-881045b1-98e0-4e6d-a2bc-6478dc7ea6ce&lang=en-us

Dell Precision T5810:
---------------------
Chipset: Intel C612
    =>
https://www.dell.com/support/manuals/nl-nl/precision-t5810-workstation/precision_t5810_om_pub/technical-specifications?guid=guid-cb1a5aa6-1e70-44b9-b690-59507a3a9f31&lang=en-us


I guess that the Dell XPS 8920 one looks like a better test case, but your
input would be highly appreciated. 

Also, I want to take the chance and learn more as I want to contribute to the
FreeBSD project, so it would be great if you can provide me with guidance and
mentorship.


Looking forward to your reply


[1] -
https://lists.freebsd.org/pipermail/freebsd-questions/2021-March/293390.html
[2] - https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=237666#c164

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