Public bug reported: Dear Support Team,
Description: Ubuntu 16.04.1 LTS Release: 16.04 my dmesg and syslog is full of warn messages (see below). I get more than 10 of this messages per second. dmesg: [ 3899.166989] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 5 ep 2 with no TDs queued? [ 3899.271440] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 5 ep 2 with no TDs queued? [ 3899.273495] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 5 ep 2 with no TDs queued? [ 3899.375906] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 5 ep 2 with no TDs queued? [ 3899.480354] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 5 ep 2 with no TDs queued? /var/log/syslog: Sep 14 15:36:56 workstation kernel: [ 3950.767800] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 5 ep 2 with no TDs queued? Sep 14 15:36:56 workstation kernel: [ 3950.872267] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 5 ep 2 with no TDs queued? Sep 14 15:36:56 workstation kernel: [ 3950.976707] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 5 ep 2 with no TDs queued? Sep 14 15:36:56 workstation kernel: [ 3951.081177] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 5 ep 2 with no TDs queued? Sep 14 15:36:56 workstation kernel: [ 3951.185616] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 5 ep 2 with no TDs queued? Sep 14 15:36:56 workstation kernel: [ 3951.394532] xhci_hcd 0000:00:14.0: WARN Event TRB for slot 5 ep 2 with no TDs queued? I *think* it is related to USB, but am not at all sure about this and cannot directly match it to anything direclty. Actually USB seems to be working for me, I just see these massive logs. On time of repoting this, I have the following USB devices attached: >lsusb [bo@workstation (~) Wed 3:45pm] lsusb Bus 002 Device 003: ID 8087:07da Intel Corp. Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 004: ID 05c8:034b Cheng Uei Precision Industry Co., Ltd (Foxlink) Bus 001 Device 003: ID 138a:003d Validity Sensors, Inc. VFS491 Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 003: ID 1058:07a8 Western Digital Technologies, Inc. My Passport (WDBBEP), My Passport for Mac (WDBLUZ) Bus 004 Device 002: ID 0424:5534 Standard Microsystems Corp. Hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 003 Device 005: ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS] Bus 003 Device 006: ID 0bda:8179 Realtek Semiconductor Corp. RTL8188EUS 802.11n Wireless Network Adapter Bus 003 Device 007: ID 1d50:6089 OpenMoko, Inc. Bus 003 Device 002: ID 0424:2134 Standard Microsystems Corp. Hub Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub I hope you can help me, as it is really annoying. Thank you and best regards Boris ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC0D0p: bo 4087 F...m pulseaudio /dev/snd/controlC0: bo 4087 F.... pulseaudio CurrentDesktop: Unity Date: Wed Sep 14 15:32:56 2016 HibernationDevice: RESUME=UUID=422c3fe4-cf87-4bfa-8415-8bd46c3ed706 InstallationDate: Installed on 2014-09-19 (726 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) MachineType: Hewlett-Packard HP EliteBook Folio 9470m ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash "acpi_osi=!Windows 2012" vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware 1.157.3 SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2016-08-18 (27 days ago) dmi.bios.date: 10/08/2013 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 68IBD Ver. F.47 dmi.board.name: 18DF dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 62.17 dmi.chassis.asset.tag: CNU412BJRP dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr68IBDVer.F.47:bd10/08/2013:svnHewlett-Packard:pnHPEliteBookFolio9470m:pvrA1029C1102:rvnHewlett-Packard:rn18DF:rvrKBCVersion62.17:cvnHewlett-Packard:ct10:cvr: dmi.product.name: HP EliteBook Folio 9470m dmi.product.version: A1029C1102 dmi.sys.vendor: Hewlett-Packard ** Affects: linux (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/1623516 Title: My sylog and dmesg is full of WARN Event TRB Messages. 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