Comment 48 for bug 1749961

Hi John,

I see this issue in a Razer core X chroma, related to the Ethernet
adapter. Obviously, this it is expansive to just buy for testing
purposes. But just wanted to mention..

Best,

Lior

On Wed, May 6, 2020 at 15:44, 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.
>
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