linux-kernel - Re: Linux 3.0-rc4: regression reconnecting bluetooth headset (A2DP fails)

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Message-ID: <4E3AEE44.10702@goop.org>
Date:	Thu, 04 Aug 2011 12:08:52 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	linux-bluetooth@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 3.0-rc4: regression reconnecting bluetooth headset (A2DP
 fails)

On 06/28/2011 01:02 PM, Gustavo F. Padovan wrote:
> * Jeremy Fitzhardinge <jeremy@...p.org> [2011-06-28 20:47:19 +0100]:
>
>> On 06/28/2011 07:21 PM, Gustavo F. Padovan wrote:
>>> Hi Jeremy,
>>>
>>> * Jeremy Fitzhardinge <jeremy@...p.org> [2011-06-23 17:29:41 -0700]:
>>>
>>>> I have a Nokia BH-905i headset.  With a stock F15 kernel, it all works
>>>> well. With current linux-2.6.git, it fails to reconnect properly.
>>>>
>>>> On connection, the headphones only beep once, whereas they normally beep
>>>> twice; I think this is one beep per profile, and its only connecting HSP
>>>> and failing A2DP.  In the sound control panel, it either comes up with
>>>> "profile: off" or with the HSP/HFP (Telephony) profile rather than A2DP,
>>>> and it fails to switch if I try to change profiles via the sound control
>>>> panel.
>>>>
>>>> However, if I re-pair the device from scratch each time I use it, it
>>>> connects properly and it all works fine.
>>>>
>>>> pactl list shows:
>>>>
>>>> Card #2
>>>> 	Name: bluez_card.00_0B_E4_A6_6C_0D
>>>> 	Driver: module-bluetooth-device.c
>>>> 	Owner Module: 23
>>>> 	Properties:
>>>> 		device.description = "Nokia BH-905i"
>>>> 		device.string = "00:0B:E4:A6:6C:0D"
>>>> 		device.api = "bluez"
>>>> 		device.class = "sound"
>>>> 		device.bus = "bluetooth"
>>>> 		device.form_factor = "headset"
>>>> 		bluez.path = "/org/bluez/843/hci0/dev_00_0B_E4_A6_6C_0D"
>>>> 		bluez.class = "0x240404"
>>>> 		bluez.name = "Nokia BH-905i"
>>>> 		device.icon_name = "audio-headset-bluetooth"
>>>> 		device.intended_roles = "phone"
>>>> 	Profiles:
>>>> 		a2dp: High Fidelity Playback (A2DP) (sinks: 1, sources: 0, priority. 10)
>>>> 		hsp: Telephony Duplex (HSP/HFP) (sinks: 1, sources: 1, priority. 20)
>>>> 		off: Off (sinks: 0, sources: 0, priority. 0)
>>>> 	Active Profile: hsp
>>>>
>>>> If I try to switch profiles on the command line it says:
>>>> $ pactl set-card-profile 2 a2dp
>>>> Failure: Input/Output error
>>>>
>>>> and /var/log/messages shows:
>>>> module-bluetooth-device.c: A2DP is not connected, refused to switch profile
>>>>
>>>> Why isn't A2DP connecting?  How can I debug this further?
>>> Can you send the output of hcidump with F15 kernel and with linux-2.6.git
>>> kernel?
>> This is already fixed in
>> git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth-2.6.git
> Great, these fixes will be in linus-2.6 soon.

There seems to have been a regression since then and the release 3.0
kernel (and the F15 "2.6.40" kernel), which have gone back to showing
the original symptoms: I can use my headphones when I first pair them,
but I can't reconnect from then.

Thanks,
    J
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