As per Mathias's email, setting xhci_hcd.quirks=0x0004b810 solves this problem. See message here: http://www.spinics.net/lists/linux- usb/msg146618.html
-- 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/1606030 Title: System reboots instead of shutting down if xhci is enabled in BIOS and USB hub is connected Status in linux package in Ubuntu: Triaged Bug description: When I connect the usb hub built into my monitor (http://www.samsung.com/uk/support/model/LS27D85KTSN/XU), the system will reboot instead of shutting down when I do a shut down. If I disable XCHI in the BIOS, the problem does not happen. If I disconnect the hub and enable XHCI, the problem does not occur. Release info: Description: Ubuntu 16.04.1 LTS Release: 16.04 Outputs of various commands are attached. Possibly related bugs: https://bugzilla.kernel.org/show_bug.cgi?id=76291 https://bugzilla.kernel.org/show_bug.cgi?id=66171 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-31-generic 4.4.0-31.50 [modified: boot/vmlinuz-4.4.0-31-generic] ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13 Uname: Linux 4.4.0-31-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: hmahmood 3688 F.... pulseaudio /dev/snd/controlC0: hmahmood 3688 F.... pulseaudio CurrentDesktop: Unity Date: Sun Jul 24 11:18:09 2016 HibernationDevice: RESUME=UUID=0477be12-31b0-423b-9277-22490ca71561 InstallationDate: Installed on 2016-07-23 (1 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-31-generic.efi.signed root=UUID=503e032f-c205-4594-a47f-cdc58ffa5dba ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-31-generic N/A linux-backports-modules-4.4.0-31-generic N/A linux-firmware 1.157.2 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/06/2016 dmi.bios.vendor: Intel Corporation dmi.bios.version: RYBDWi35.86A.0358.2016.0606.1423 dmi.board.name: NUC5i5RYB dmi.board.vendor: Intel Corporation dmi.board.version: H40999-503 dmi.chassis.type: 3 dmi.modalias: dmi:bvnIntelCorporation:bvrRYBDWi35.86A.0358.2016.0606.1423:bd06/06/2016:svn:pn:pvr:rvnIntelCorporation:rnNUC5i5RYB:rvrH40999-503:cvn:ct3:cvr: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1606030/+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
