Re: USB-C Devices only show up if connected at boot

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On Wed, 24 Jan 2018 at 04:07 Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>
> 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

Hi

PCI Hotplug and ACPI Hotplug are disabled on my system due to bug
https://bugzilla.kernel.org/show_bug.cgi?id=112121 where by my NVMe
drive would disappear from the system after suspend making my system
inoperable

I tried enabling PCI Hotplug, PCIE Hotplug and ACPI Hotplug - the
USB-C device still didn't appear when plugged in

The suspend bug still remained and when trying with
CONFIG_ACPI_PCI_SLOT the whole system refused to boot (unable to find
systemd), I'm guessing the hard drive didn't enumerate

Regards

Mike
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