Hi Mathias, That worked, although I had to specify the quirks via a kernel boot parameter. Thanks for your help! Hasan. On Mon, Sep 12, 2016 at 9:40 AM, Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> wrote: > On 05.09.2016 19:46, Hasan Mahmood wrote: >> >> System reboots instead of shutting down if xhci is enabled in BIOS and >> USB hub is connected >> >> 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. >> >> Possibly related bugs: >> https://bugzilla.kernel.org/show_bug.cgi?id=76291 >> https://bugzilla.kernel.org/show_bug.cgi?id=66171 >> >> 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: >> >> $ cat /proc/version >> Linux version 4.8.0-040800rc5-lowlatency (kernel@tangerine) (gcc >> version 6.2.0 20160830 (Ubuntu 6.2.0-2ubuntu11) ) #201609041832 SMP >> PREEMPT Sun Sep 4 22:38:41 UTC 2016 >> >> launchpad bug: >> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1606030 >> > > Launchpad bug shows you machine has a Wildcat Point-LP USB xHCI Controller > [8086:9cb1] > > Launcpad dmesg log also show xhci loads with quirks 0x00009810 missing > XHCI_SPURIOUS_REBOOT and XHCI_SPURIOUS_WAKEUP quirks > > xHCI on Wildcat point-LP should be quite similar to Lynxpoint-LP xHCI, > but driver does not set the quirks as they depend on xHCI Lynxpoint PCI > device ID > > Can you try reloading xhci with those quirks (BIT 13 and BIT 18) > In your case the old + new quirks should be 0x0004b810 > > Something like this should do it: > > sudo modprobe -r xhci_pci > sudo modprobe xhci_hcd quirks=0x0004b810 > sudo modprobe xhci_pci > (see from dmesg xhci loaded properly and with the new quirks) > try to shutdown with hub connected > > -Mathias -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
