Subject: Re: [Bluez-devel] Re: Jumpy cursor with Wacom Graphire Bluetooth
From: Marcel Holtmann <marcel@holtmann.org>
To: bluez-devel@lists.sourceforge.net
In-Reply-To: <20051128092101.GM15156@polar.elf12.net>
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Date: Mon, 28 Nov 2005 10:36:51 +0100

Hi Robert,

> > > > > > What does the pairing button do? It makes the device discoverable and
> > > > > > pairable, right?
> > > > > 
> > > > > I think so. It is already a "long time" ago, because some things did
> > > > > work with the pairing auth/enc switched on, but it did not end up
> > > > > working (to the level it does without)...
> > > > 
> > > > Don't even think about switching into security mode 3. Use the -E switch
> > > > of hidd instead.
> 
> Why? What is the difference?

the security mode 3 comes with a lot of troubles and unless you really
know what you are doing, don't use it. Period.

> > > Man page and hidd --help output don't say it: what does the -E switch?
> > 
> > This is a lack in the documentation. The -E switch works the same as in
> > pand and dund. It establishes encryption (and authentication) for every
> > keyboard device.
> 
> Okay, hidd is running with "--server -E". No visible change. Where could
> I actually look at to verify the encryption? Anyway
> /etc/bluetooth/link_key is zero bytes long. - Where would the key be?

You can check with "hcitool con" is the encryption for a link is active.
The new tools store the link keys under /var/lib/bluetooth and if the
tablet is detected as mouse then maybe the encryption will never be
requested by hidd.

Regards

Marcel


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