On Tue, Jan 23, 2018 at 05:43:27PM +0000, Mike Lothian wrote: > On Tue, 23 Jan 2018 at 17:30 Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > > > On Tue, Jan 23, 2018 at 05:12:03PM +0000, Mike Lothian wrote: > > > Hi > > > > > > I raised https://bugzilla.kernel.org/show_bug.cgi?id=198557 but was > > > informed by Greg bugs should be raised on the mailing list not in > > > bugzilla > > > > > > So USB-C devices only show up in dmesg or for use if they are > > > connected during boot > > > > > > Once booted and the device is disconnected the following message > > > appears in the dmesg: > > > > > > [ 100.814687] usb 3-1: USB disconnect, device number 3 > > > [ 100.882840] xhci_hcd 0000:39:00.0: xHCI host controller not > > > responding, assume dead > > > [ 100.882843] xhci_hcd 0000:39:00.0: HC died; cleaning up > > > > > > No further connections or disconnections display anything further in > > > the dmesg, the device works fine if connected via USB-A > > > > > > I've witnessed this behaviour since getting the laptop at the end of > > > 2015 so this isn't a regression > > > > Is there a BIOS update for the laptop? This has been seen a lot in the > > past on lots of different laptops but was always resolved by the BIOS > > update (the latest one for mine also updates the xhci controller as > > well.) > > > > thanks, > > > > greg k-h > > > Hi > > I've applied all BIOS updates for my laptop including the pulled one > for Spectre/Meltdown & ME bugs the other week > http://www.dell.com/support/home/uk/en/ukdhs1/product-support/servicetag/8k5w662/drivers > > If it helps, I don't have this issue in Windows but I rarely have it booted > > I thought it might have something to do with an ACPI failure (see bug > https://bugzilla.kernel.org/show_bug.cgi?id=198051) I can't see web links at the moment, but are you sure you have PCI hotplug enabled in your kernel? Same for ACPI PCI hotplug? That's how the controller usually shows up in the system, and that's a PCI issue, not a USB issue. thanks, greg k-h -- 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
