Re: xhci driver guestion: is this a driver bug?

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On Fri, Jun 08, 2012 at 02:36:36PM -0700, walt wrote:
> 03:00.0 USB controller: ASMedia Technology Inc. ASM1042 SuperSpeed USB Host Controller
>         Subsystem: Device 174c:2104
>         Kernel driver in use: xhci_hcd
> 
> This is an add-on usb3 adapter, which I connect to an external usb3/SATA
> docking station.  The whole setup works extremely well except for one
> annoying thing:
> 
> When I power-up the docking station with the computer already running,
> neither the docking station nor the hard disk show up until I do one
> of two things:  either reboot, or rmmod/modprobe the xhci module (which
> loads automatically during boot).
> 
> What's your opinion -- should the xhci driver be able to work around this
> problem without help?  Dunno.

That sounds like a PCI hotplug issue, do you have the proper pci hotplug
driver loaded for this docking station and does it properly detect when
it is plugged in?

greg k-h
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