Hi Guilherme, Thanks for the response. I have several (3) quad port ASMedia 2142 PCIe/USB 3.1 cards installed in a Dell R740 rack server. I am using the standard Ubuntu 18.04 kernel (Linux dell-PowerEdge-R740 4.15.0-36-generic #39-Ubuntu SMP Mon Sep 24 16:19:09 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux).
For one of my applications, it runs a loop that opens and closes a high speed connection to a USB device connected through the ASMedia board. After this goes on for several minutes without any issues, I see this in dmesg: [Oct 5 10:12] xhci_hcd 0000:be:00.0: WARN Set TR Deq Ptr cmd failed due to incorrect slot or ep state. [ +3.418076] xhci_hcd 0000:be:00.0: WARN Successful completion on short TX [ +0.000035] xhci_hcd 0000:be:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 12 comp_code 1 [ +0.000003] xhci_hcd 0000:be:00.0: Looking for event-dma 0000001fe9759610 trb-start 0000001fe9759620 trb-end 0000001fe9759620 seg-start 0000001fe9759000 seg-end 0000001fe9759ff0 This is then followed shortly after by several kernel dump messages, and then the whole system starts behaving erratically, requiring a hard reboot to recover. The condition is easy for me to reproduce and I will happily provide any logs that may be of use to help debug this. Please just let me know what you would like and how to get them (as I am not a kernel expert). Thanks, Roy -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1749961 Title: xhci_hcd: TRB DMA errors reported with ASMedia ASM1142 USB 3.1 Controller To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1749961/+subscriptions -- ubuntu-bugs mailing list firstname.lastname@example.org https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs