No sound under Karmic after upgrade from 9.04

[Tony Lewis]

Binary package hint: pulseaudio

I have tried a number of other hints in bug reports (e.g. sudo /sbin/alsa force-unload && sudo modprobe snd-hda-intel model=ref && speaker-test -c2 -Dplug:front) and once (and only once) have a managed to get some pink noise from the speakers. Unable to replicate.

I also note that I am no longer in the audio group. The only real user in that group (via /etc/group) is alphabetically the first real (non-system) user. Aside: this also seems to be the case for the video group, and some others.

But even switching to that user that is in the group, I cannot get audio.

Prior to running speaker-test, I have disabled autospawn for pulseaudio, and ensured that the daemon is not running. No success. I have unmuted and unzeroed everything in alsamixer.

I see the following significant results from syslog:

    Oct 4 23:46:05 baryon pulseaudio[6279]: reserve-wrap.c: Failed to acquire reservation lock on device 'Audio0': Input/output error

And, since disabling autospawn:
    Oct 5 00:05:05 baryon pulseaudio[2482]: reserve-wrap.c: Unable to contact D-Bus session bus: org.freedesktop.DBus.Error.Spawn.ExecFailed: /bin/dbus-launch terminated abnormally with the following error: Autolaunch error: X11 initialization failed.
    Oct 5 00:05:06 baryon pulseaudio[2482]: reserve-wrap.c: Unable to contact D-Bus session bus: org.freedesktop.DBus.Error.Spawn.ExecFailed: /bin/dbus-launch terminated abnormally with the following error: Autolaunch error: X11 initialization failed.
    Oct 5 00:05:06 baryon pulseaudio[2482]: main.c: Unable to contact D-Bus: org.freedesktop.DBus.Error.Spawn.ExecFailed: /bin/dbus-launch terminated abnormally with the following error: Autolaunch error: X11 initialization failed.

ProblemType: Bug
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: tony 2843 F.... pulseaudio
 /dev/snd/pcmC0D0p: tony 2843 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf2500000 irq 16'
   Mixer name : 'Realtek ALC888'
   Components : 'HDA:10951392,ffffffff,00100000 HDA:10ec0888,1458a002,00100001'
   Controls : 44
   Simple ctrls : 23
Date: Mon Oct 5 00:10:55 2009
DistroRelease: Ubuntu 9.10
Package: pulseaudio 1:0.9.18-0ubuntu3
ProcEnviron:
 PATH=(custom, user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-11.36-generic
SourcePackage: pulseaudio
Uname: Linux 2.6.31-11-generic x86_64

[Tony Lewis (tonylewis)]

And now it appears to be working. Perhaps I wasn't as rigorous in my unmuting of muted settings as I had hoped.

Please invalidate; I will re-raise bug if something resurfaces