Re: [Bluez-users] help with Logitech Travel Mouse

[Martin Stolle <mstoll@sus.mcgill.ca>]

On Thu, Sep 27, 2007 at 09:39:12AM +0200, Marcel Holtmann wrote:
> > 
> > Thank you very much.  I didn't realize that hidd were supposed to still
> > work.  I will look into writing a python tool that does what I want to
> > do.  However, I still don't quite understand why the hidd behavior has
> > changed and/or why it is incorrect to use them more then once.  In
> > particular, in the case where a device (keyboard/mouse) was once paired
> > with a computer, but then has been re-paired with another computer.  If
> > I want to reconnect the keyboard/mouse to the first computer, wouldn't I
> > have to re-issue a hidd --connect <MAC> ?  (or the equivalent D-Bus
> > calls?)
> 
> the HID devices are not designed to work like this. Period. They only
> support one binding with a host system. You try to make it work with a
> scenario it is not designed for. If you need details, check the
> Bluetooth HID specification.
> 

I understand that HID devices only support one binding at a time.  But
if I want to use the same keyboard with two systems, not at the same
time but back and forth, then I should be able to re-authenticate it
with the previous system.  This is a use case that totally makes sense
and works fine.  It used to work fine between two Linux system, two
Windows system and a Windows and Linux system.  I just had one keyboard
and whenever I wanted to use it with another system, I'd reset the
keyboard and re-pair it with the system at hand.  This is definitely
possible and I am sure that the specifications allow for pairing with a
system that was previously paired with in case the HID device lost its
pairing.

(And no, I don't expect it two work with two systems at the same time or
interchangeably without re-pairing.  I completely understand that the
HID device can only be paired with one system at any one moment in time)

Martin


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