Ok, so it appears that module-device-restore is attempting to use a
nonexistent sink/source, so it falls back to dummy/null. This is caused
by module-udev-detect not having loaded by the time module-device-
restore is loaded, as can be seen in /etc/pulse/default.pa (I'm
including the snippet from the source):
### Automatically restore the volume of streams and devices
load-module module-device-restore
load-module module-stream-restore
load-module module-card-restore
...
### Automatically load driver modules depending on the hardware available
.ifexists module-udev-det...@pa_soext@
load-module module-udev-detect
.else
### Alternatively use the static hardware detection module (for systems that
### lack udev support)
load-module module-detect
.endif
From your log:
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module-device-restore.c: Sucessfully
opened database file
'/home/ubuntu/.pulse/edb88c50b54cfd6a9837a2474bbca403-device-volumes'.
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module.c: Loaded
module-device-restore (index: #0; argument: ).
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module-stream-restore.c: Sucessfully
opened database file
'/home/ubuntu/.pulse/edb88c50b54cfd6a9837a2474bbca403-stream-volumes'.
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module.c: Loaded
module-stream-restore (index: #1; argument: ).
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module-card-restore.c: Sucessfully
opened database file
'/home/ubuntu/.pulse/edb88c50b54cfd6a9837a2474bbca403-card-database'.
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module.c: Loaded module-card-restore
(index: #2; argument: ).
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module.c: Loaded
module-augment-properties (index: #3; argument: ).
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module-udev-detect.c: Found 1 cards.
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module.c: Loaded module-udev-detect
(index: #4; argument: ).
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module.c: Loaded
module-bluetooth-discover (index: #5; argument: ).
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module.c: Loaded
module-esound-protocol-unix (index: #6; argument: ).
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module.c: Loaded
module-native-protocol-unix (index: #7; argument: ).
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module.c: Loaded module-gconf
(index: #8; argument: ).
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module-default-device-restore.c: Saved
default sink 'alsa_output.usb-041e_USB_Audio-00-MP3.analog-stereo' not
existant, not restoring default sink setting.
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module-default-device-restore.c: Saved
default source 'alsa_input.usb-041e_USB_Audio-00-MP3.analog-stereo' not
existant, not restoring default source setting.
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module.c: Loaded
module-default-device-restore (index: #9; argument: ).
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module.c: Loaded
module-rescue-streams (index: #10; argument: ).
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module-device-restore.c: Restoring
volume for sink auto_null.
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module-device-restore.c: Restoring
mute state for sink auto_null.
Apr 7 17:29:14 ubuntu pulseaudio[4049]: sink.c: Created sink 0 auto_null
with sample spec s16le 2ch 44100Hz and channel map front-left,front-right
Apr 7 17:29:14 ubuntu pulseaudio[4049]: sink.c: device.description =
Dummy Output
Apr 7 17:29:14 ubuntu pulseaudio[4049]: sink.c: device.class = abstract
Apr 7 17:29:14 ubuntu pulseaudio[4049]: sink.c: device.icon_name =
audio-card
Apr 7 17:29:14 ubuntu pulseaudio[4049]: source.c: Created source 0
auto_null.monitor with sample spec s16le 2ch 44100Hz and channel map
front-left,front-right
Apr 7 17:29:14 ubuntu pulseaudio[4049]: source.c: device.description =
Monitor of Dummy Output
Apr 7 17:29:14 ubuntu pulseaudio[4049]: source.c: device.class = monitor
Apr 7 17:29:14 ubuntu pulseaudio[4049]: source.c: device.icon_name =
audio-input-microphone
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module.c: Loaded module-null-sink
(index: #11; argument: sink_name=auto_null
sink_properties='device.description=Dummy Output').
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module.c: Loaded module-always-sink
(index: #12; argument: ).
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module.c: Loaded
module-intended-roles (index: #13; argument: ).
Apr 7 17:29:14 ubuntu pulseaudio[4049]: module.c: Loaded
module-suspend-on-idle (index: #14; argument: ).
Apr 7 17:29:14 ubuntu pulseaudio[4049]: client.c: Created 0 ConsoleKit
Session /org/freedesktop/ConsoleKit/Session1
Apr 7 17:29:14 ubuntu pulseaudio[4049]: client.c: Created 1 ConsoleKit
Session /org/freedesktop/ConsoleKit/Session2
Apr 7 17:29:14 ubuntu pulseaudio[4049]: client.c: Created 2 ConsoleKit
Session /org/freedesktop/ConsoleKit/Session3
Apr 7 17:29:14 ubuntu pulseaudio[4049]: client.c: Created 3 ConsoleKit
Session /org/freedesktop/ConsoleKit/Session4
Apr 7 17:29:14 ubuntu
