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Re: [Resend PATCH V2 3/7] usb: Set device removable state based on ACPI USB data

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On Mon, May 07, 2012 at 09:38:15AM +0800, Lan Tianyu wrote:
> On 2012年05月04日 14:24, Oliver Neukum wrote:
> >Am Freitag, 4. Mai 2012, 05:06:39 schrieb Lan Tianyu:
> >>
> >>From: Matthew Garrett<mjg@xxxxxxxxxx>
> >>
> >>ACPI offers two methods that allow us to infer whether or not a USB port
> >>is removable. The _PLD method gives us information on whether the port is
> >>"user visible" or not. If that's not present then we can fall back to the
> >>_UPC method which tells us whether or not a port is connectable.
> >
> >How does this act on bluetooth devices that are (dis)connected by switches
> >on laptops?
> This depends on the bios. From my opinion, the bluetooth is device on the
> motherboard so it belongs to hard-wired type.

That's nice, but it's not what is happening in lots of different laptops
out there today.

Oliver is right, how does this handle bluetooth USB controllers that are
turned on/off from magic function-key presses?

thanks,

greg k-h
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