Hi John and all, thanks for updating logs and enhancing the report! Due
to a lot of other work, and the nature of this problem (being a FW issue
that we'd try to alleviate using a hack in linux), I wasn't able to work
the tentative hack approach yet.

The issue was "resolved" through a FW update by ASMedia, but this was
only worked with a specific motherboard vendor, not as a general
release. This is the problem with FW fixes...they are quite scattered
and vendor-depending. So, can you John or any of the reporters try to
reproduce the problem with:

(a) Ubuntu 20.04, just released?
(b) Ubuntu 18.04 running the current HWE kernel (5.3)?

That'd be good data points. Also, if you could try Ubuntu 20.04 with latest 
mainline kernel (from [0]), that would be a gigantic help!
Thanks in advance,


[0] https://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D

** No longer affects: linux (Ubuntu Artful)

** Changed in: linux (Ubuntu Trusty)
       Status: In Progress => Won't Fix

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  xhci_hcd: TRB DMA errors reported with ASMedia ASM1142 USB 3.1

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