Re: Bluetooth 1.5 update
Re: Bluetooth 1.5 update
- Subject: Re: Bluetooth 1.5 update
- From: Eric Brown <email@hidden>
- Date: Fri, 6 Feb 2004 11:13:24 -0800
On Feb 6, 2004, at 8:45 AM, Garth Cummings wrote:
>
Hi Asam,
>
>
On Feb 5, 2004, at 6:02 PM, //aSaM// wrote:
>
>
> There are some problems however. Once the HBH-15 is paired up to the
>
> PowerBook and then you turn the headset off and go to System Prefs
>
> ---> Sound and try to revert back to the internal sound the Sound
>
> Prefs pane gets stuck with a spining beach ball. Also you get a user
>
> notification "Bluetooth audio failed.... some audio program may have
>
> to be started bla bla bla
>
>
<snip>
>
>
I'd expect this to work the same as unplugging a pair of USB
>
speakers...the system sound output device should just revert back to
>
the built-in speakers.
>
Actually, it doesn't quite behave the same as USB speakers. The
headset will always show up in the sound prefs until the pairing is
deleted. Turning off the phone or disconnecting the baseband link is
not the same as unplugging a set of speakers. Deleting the pairing is
a closer match. When the headset is in use and is powered off, there
is a hardware timeout that must occur before we are informed that the
link has been lost. At that point, the error panel described above is
presented.
In the above scenario, it sounds like the link wasn't up when the
device was powered. It is likely caused by the fact that the sound
prefs attempts to open the current audio device when it is displayed
(for the input VU meter). The audio device open / start process is
synchronous and must wait for an attempt to connect to the headset to
fail (~5 seconds). The fact that the process is synchronous and can't
be cancelled is what causes the spinning cursor. As soon as the
connection failure occurs, control returns to the sound panel and
further user input is processed.
- Eric
[demime 0.98b removed an attachment of type application/pkcs7-signature which had a name of smime.p7s]
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