I also briefly rechecked all USB connections on the back of the computer case for loose connections, leaving intel_iommu=off activate within the kernel command line options.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1749961 Title: xhci_hcd: TRB DMA errors reported with ASMedia ASM1142 USB 3.1 Controller Status in Linux: Confirmed 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: Confirmed Status in linux source package in Bionic: Confirmed 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/linux/+bug/1749961/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
