I too encountered this problem: Bluetooth audio stopped working after I
upgraded to 16.04.
Running pulseaudio -v, I saw my headphones connect, then the
TryAcquire() error message from the subject line of this bug:
I: [pulseaudio] module.c: Loaded "module-bluez5-device" (index: #21; argument:
"path=/org/bluez/hci0/dev_00_18_09_24_DD_95").
I: [pulseaudio] module-card-restore.c: Card bluez_card.00_18_09_24_DD_95
profile a2dp_sink became available, activating.
I: [pulseaudio] module-bluez5-device.c: Transport
/org/bluez/hci0/dev_00_18_09_24_DD_95/fd3 acquired: fd 30
I: [pulseaudio] module-bluez5-device.c: SBC parameters: allocation=0,
subbands=1, blocks=3, bitpool=53
I: [pulseaudio] module-device-restore.c: Restoring volume for sink
bluez_sink.00_18_09_24_DD_95: front-left: 54407 / 83%, front-right: 54407 /
83%
I: [pulseaudio] module-device-restore.c: Restoring mute state for sink
bluez_sink.00_18_09_24_DD_95: unmuted
I: [pulseaudio] sink.c: Created sink 1 "bluez_sink.00_18_09_24_DD_95" with
sample spec s16le 2ch 44100Hz and channel map front-left,front-right
I: [pulseaudio] sink.c: bluetooth.protocol = "a2dp_sink"
I: [pulseaudio] sink.c: device.description = "MDR-AS800BT"
I: [pulseaudio] sink.c: device.string = "00:18:09:24:DD:95"
I: [pulseaudio] sink.c: device.api = "bluez"
I: [pulseaudio] sink.c: device.class = "sound"
I: [pulseaudio] sink.c: device.bus = "bluetooth"
I: [pulseaudio] sink.c: device.form_factor = "headset"
I: [pulseaudio] sink.c: bluez.path = "/org/bluez/hci0/dev_00_18_09_24_DD_95"
I: [pulseaudio] sink.c: bluez.class = "0x240404"
I: [pulseaudio] sink.c: bluez.alias = "MDR-AS800BT"
I: [pulseaudio] sink.c: device.icon_name = "audio-headset-bluetooth"
I: [pulseaudio] sink.c: device.intended_roles = "phone"
I: [pulseaudio] source.c: Created source 1
"bluez_sink.00_18_09_24_DD_95.monitor" with sample spec s16le 2ch 44100Hz and
channel map front-left,front-right
I: [pulseaudio] source.c: device.description = "Monitor of MDR-AS800BT"
I: [pulseaudio] source.c: device.class = "monitor"
I: [pulseaudio] source.c: device.string = "00:18:09:24:DD:95"
I: [pulseaudio] source.c: device.api = "bluez"
I: [pulseaudio] source.c: device.bus = "bluetooth"
I: [pulseaudio] source.c: device.form_factor = "headset"
I: [pulseaudio] source.c: bluez.path =
"/org/bluez/hci0/dev_00_18_09_24_DD_95"
I: [pulseaudio] source.c: bluez.class = "0x240404"
I: [pulseaudio] source.c: bluez.alias = "MDR-AS800BT"
I: [pulseaudio] source.c: device.icon_name = "audio-headset-bluetooth"
I: [pulseaudio] source.c: device.intended_roles = "phone"
I: [bluetooth] core-util.c: Successfully enabled SCHED_RR scheduling for
thread, with priority 5.
I: [bluetooth] module-bluez5-device.c: Transport
/org/bluez/hci0/dev_00_18_09_24_DD_95/fd3 resuming
I: [pulseaudio] module-always-sink.c: A new sink has been discovered. Unloading
null-sink.
I: [pulseaudio] card.c: Changed profile of card 1
"bluez_card.00_18_09_24_DD_95" to a2dp_sink
I: [pulseaudio] module-card-restore.c: Storing card profile for card
bluez_card.00_18_09_24_DD_95.
I: [bluetooth] bluez5-util.c: Transport
/org/bluez/hci0/dev_00_18_09_24_DD_95/fd3 auto-released by BlueZ or already
released
I: [pulseaudio] module.c: Unloading "module-null-sink" (index: #14).
I: [pulseaudio] sink.c: Freeing sink 0 "auto_null"
I: [pulseaudio] source.c: Freeing source 0 "auto_null.monitor"
I: [pulseaudio] module.c: Unloaded "module-null-sink" (index: #14).
I: [pulseaudio] module-card-restore.c: Card bluez_card.00_18_09_24_DD_95
profile a2dp_sink became available, activating.
E: [pulseaudio] bluez5-util.c: Transport TryAcquire() failed for transport
/org/bluez/hci0/dev_00_18_09_24_DD_95/fd3 (Operation Not Authorized)
Digging into the source, it looks like TryAcquire() simply tries to send
a message over the DBus. A little digging led me to
/etc/dbus-1/system.d/bluetooth.conf, which contains the following:
<!-- allow users of bluetooth group to communicate -->
<policy group="bluetooth">
<allow send_destination="org.bluez"/>
</policy>
<policy at_console="true">
<allow send_destination="org.bluez"/>
</policy>
I tried adding myself to the bluetooth group, restarted, and boom! now I
have audio.
So it appears something changed between 15.10 and 16.04 w.r.t. the DBus
permissions - the behavior of at_console perhaps? The bluez package
owns the above config file, so I added it to this bug.
** Also affects: bluez
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1577197
Title:
Pulseaudio bluez5-util.c: TryAcquire() failed - Operation Not
Authorized
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