Hi John,

The webcam in my trace is
https://www.amazon.com/gp/product/B07P7YSZV1/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
The pcie card that looks identical to this one
https://www.newegg.com/model-orico-pa31-2p-pci-express-to-usb-card/p/17Z-0003-00008?Description=usb%203.1%20&cm_re=usb_3.1-_-9SIA1DS4TW2779-_-Product

I could mail you one of each if you're interested in working on a fix.

On Wed, May 6, 2020 at 8:50 AM John Jackson <email address hidden>
wrote:

> Hi Ubuntu Community,
>
> I would like to find one of the COTS products that is reproducing this
> issue. From reading the thread above it looks like it is a camera and a
> usb ethernet adapter. Does anyone have more specifics or a product link
> where I can purchase these. I currently havent seen the issue with a Usb
> block device such as a JMicron nvme to usb device type c, but I will
> continue testing.
>
> Where can i find this camera?
> Camera 1080p60 USB3 webcam
> idVendor=15aa, idProduct=1555
>
>
> Thanks,
> John
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1749961
>
> Title:
>   xhci_hcd: TRB DMA errors reported with ASMedia ASM1142 USB 3.1
>   Controller
>
> Status in linux package in Ubuntu:
>   In Progress
> Status in linux source package in Trusty:
>   Won't Fix
> Status in linux source package in Xenial:
>   In Progress
> Status in linux source package in Bionic:
>   In Progress
> Status in linux source package in Focal:
>   Confirmed
> Status in linux package in Debian:
>   Confirmed
>
> Bug description:
>   It was observed that while trying to use a 4K USB webcam connected to
>   USB port provided by ASMedia ASM1142 USB 3.1 Controller, the webcam
>   does not work and kernel log shows the following messages:
>
>   [431.928016] xhci_hcd 0000:12:00.0: ERROR Transfer event TRB DMA ptr not
> part of current TD ep_index 2 comp_code 13
>   [431.928021] xhci_hcd 0000:12:00.0: Looking for event-dma
> 0000003f3330e020 trb-start 0000003f3330e000 trb-end 0000003f3330e000
> seg-start 0000003f3330e000 seg-end 0000003f3330eff0
>   [431.928024] xhci_hcd 0000:12:00.0: ERROR Transfer event TRB DMA ptr not
> part of current TD ep_index 2 comp_code 13
>   [431.928026] xhci_hcd 0000:12:00.0: Looking for event-dma
> 0000003f3330e030 trb-start 0000003f3330e000 trb-end 0000003f3330e000
> seg-start 0000003f3330e000 seg-end 0000003f3330eff0
>   [431.928027] xhci_hcd 0000:12:00.0: ERROR Transfer event TRB DMA ptr not
> part of current TD ep_index 2 comp_code 13
>   [431.928029] xhci_hcd 0000:12:00.0: Looking for event-dma
> 0000003f3330e050 trb-start 0000003f3330e000 trb-end 0000003f3330e000
> seg-start 0000003f3330e000 seg-end 0000003f3330eff0
>   [431.928386] xhci_hcd 0000:12:00.0: ERROR Transfer event TRB DMA ptr not
> part of current TD ep_index 2 comp_code 13
>
>   A similar issue was already reported on Launchpad:
>   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1667750
>
>   The fix to this issue seems to be the following patch:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9da5a109
>
>   Tests in our scenario with this patch proved still broken. Our next
>   approach is to modify the patch a bit and re-test.
>
>   This LP will be used to document our progress in the investigation.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1749961/+subscriptions
>