external speaker does not work for audio playback

Binary package hint: pulseaudio

This bug is a carryover from #355727, regarding Ubuntu 9.04. The relevant version of pulseaudio is 1:0.9.14-0ubuntu20. I have re-run the alsa-info.sh script; the output is available at http://www.alsa-project.org/db/?f=aba8784b3860486e8b1dfc459d386a11d735d4cf

Audio playback originally worked fine in 8.10, then became corrupted in 9.04; the external speaker did not work at all and the headphone jack played back very staticky audio. The most recent set of pulseaudio packages appears to have resolved the headphone issues, but there is still no audio from the external speaker.

ProblemType: Bug
Amixer.0.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfe938000 irq 16'
   Mixer name : 'IDT 92HD75B2X5'
   Components : 'HDA:111d7608,103c361a,00100102'
   Controls : 27
   Simple ctrls : 17
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 2/2
   Subdevice #0: subdevice #0
   Subdevice #1: subdevice #1
DistroRelease: Ubuntu 9.04
Package: pulseaudio 1:0.9.14-0ubuntu20
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: pulseaudio
Uname: Linux 2.6.28-11-generic i686