Public bug reported: I have a 2 machine vision cameras each connected to a PCIe card based on the Renesas uPD720202 USB controller. During data transfer the following warning is spammed to klog:
Nov 23 11:30:30 $hostname kernel: xhci_hcd 0000:08:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk? Nov 23 11:30:30 $hostname kernel: xhci_hcd 0000:07:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk? Nov 23 11:30:30 $hostname kernel: xhci_hcd 0000:08:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk? Nov 23 11:30:30 $hostname kernel: xhci_hcd 0000:07:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk? Nov 23 11:30:30 $hostname kernel: xhci_hcd 0000:08:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk? Nov 23 11:30:30 $hostname kernel: xhci_hcd 0000:07:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk? Nov 23 11:30:30 $hostname kernel: xhci_hcd 0000:08:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk? Nov 23 11:30:30 $hostname kernel: xhci_hcd 0000:07:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk? Nov 23 11:30:30 $hostname kernel: xhci_hcd 0000:08:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk? Nov 23 11:30:30 $hostname kernel: xhci_hcd 0000:07:00.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk? Nov 23 11:30:35 $hostname kernel: handle_tx_event: 992 callbacks suppressed Based on the frequency of messages I conclude that this happens each time a frame is transferred. (2 cameras each at 100 fps). I'm reporting this against linux-lowlatency-hwe-16.04-edge (4.13.0-19-lowlatency) but I have observed this in several kernel versions. I find references to it online dating back to 2014, and a proposed patch available at https://patchwork.kernel.org/patch/9907581/ It seems likely that the underlying issue is the same as in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1710548 (I got a few timeout from launchpad.net while submitting this. Let me know if the apport files didn't come through) ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.13.0-19-lowlatency 4.13.0-19.22~16.04.1 ProcVersionSignature: Ubuntu 4.13.0-19.22~16.04.1-lowlatency 4.13.13 Uname: Linux 4.13.0-19-lowlatency x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu2.10 Architecture: amd64 Date: Mon Dec 11 13:38:23 2017 SourcePackage: linux-hwe-edge UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: linux-hwe-edge (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1737629 Title: Renesas uPD720202 XHCI floods klog with warnings To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-edge/+bug/1737629/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
