On 09/12/2011 06:33 PM, Jeremy Fitzhardinge wrote:

Hi all,

I reported a regression in connecting my Nokia BH-905i headphones in
June this year (https://lkml.org/lkml/2011/6/23/770), which was the same
problem Keith Packard reported in https://lkml.org/lkml/2011/6/9/63.  
It was briefly fixed in
git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth-2.6.git.

Unfortunately it regressed again by the time of the linux-3.0 release,
to something with similar symptoms: the headphones won't reliably
connect to my laptop unless I freshly re-pair them.  However, unlike the
original bug, they will very occasionally connect normally, though I
don't know why.

This behaviour has been consistent since 3.0 up until the current
3.1-rc6 kernel.

What further information can I provide?  How can I help debug this?

I turned on debugging by running "bluetoothd -n -d", and got the
following when trying to connect my headphones:

Sep 16 15:30:47 saboo bluetoothd[22025]: bluetoothd[22025]: audio/headset.c:headset_set_state() State changed /org/bluez/22025/hci0/dev_00_0B_E4_A6_6C_0D: HEADSET_STATE_DISCONNECTED -> HEADSET_STATE_CONNECTING
Sep 16 15:30:47 saboo bluetoothd[22025]: bluetoothd[22025]: src/adapter.c:adapter_get_device() 00:0B:E4:A6:6C:0D
Sep 16 15:30:47 saboo bluetoothd[22025]: bluetoothd[22025]: plugins/hciops.c:remote_features_information() hci0 status 0
Sep 16 15:30:48 saboo bluetoothd[22025]: bluetoothd[22025]: plugins/hciops.c:remote_name_information() hci0 status 0
Sep 16 15:30:48 saboo bluetoothd[22025]: bluetoothd[22025]: audio/headset.c:headset_set_channel() Discovered Handsfree service on channel 1
Sep 16 15:30:48 saboo bluetoothd[22025]: bluetoothd[22025]: audio/headset.c:rfcomm_connect() /org/bluez/22025/hci0/dev_00_0B_E4_A6_6C_0D: Connecting to 00:0B:E4:A6:6C:0D channel 1
Sep 16 15:30:48 saboo bluetoothd[22025]: bluetoothd[22025]: plugins/hciops.c:link_key_request() hci0 dba 00:0B:E4:A6:6C:0D
Sep 16 15:30:48 saboo bluetoothd[22025]: bluetoothd[22025]: plugins/hciops.c:link_key_request() kernel auth requirements = 0x04
Sep 16 15:30:48 saboo bluetoothd[22025]: bluetoothd[22025]: plugins/hciops.c:link_key_request() Matching key found
Sep 16 15:30:48 saboo bluetoothd[22025]: bluetoothd[22025]: plugins/hciops.c:link_key_request() link key type 0x04
Sep 16 15:30:48 saboo bluetoothd[22025]: bluetoothd[22025]: plugins/hciops.c:auth_complete() hci0 status 0
Sep 16 15:30:48 saboo bluetoothd[22025]: bluetoothd[22025]: src/event.c:btd_event_bonding_process_complete() status=00
Sep 16 15:30:48 saboo bluetoothd[22025]: bluetoothd[22025]: src/adapter.c:adapter_get_device() 00:0B:E4:A6:6C:0D
Sep 16 15:30:48 saboo bluetoothd[22025]: bluetoothd[22025]: src/event.c:btd_event_bonding_process_complete() no pending auth request
Sep 16 15:30:50 saboo bluetoothd[22025]: bluetoothd[22025]: Permission denied (13)
Sep 16 15:30:50 saboo bluetoothd[22025]: Permission denied (13)
Sep 16 15:30:50 saboo bluetoothd[22025]: bluetoothd[22025]: audio/headset.c:headset_set_state() State changed /org/bluez/22025/hci0/dev_00_0B_E4_A6_6C_0D: HEADSET_STATE_CONNECTING -> HEADSET_STATE_DISCONNECTED
Sep 16 15:30:50 saboo bluetoothd[22025]: bluetoothd[22025]: src/adapter.c:adapter_get_device() 00:0B:E4:A6:6C:0D


Does this cast any light on what's going wrong?

Thanks,
    J