Comment 2 for bug 313369

> http://ubuntuforums.org/showthread.php?t=1012179

All channels are not muted and set at a reasonable volume.

> http://ubuntuforums.org/showthread.php?t=205449

The initial troubleshooting steps are similar to the wiki.ubuntu.com ones. Nothing glaringly wrong but still no sound.

> http://ubuntuforums.org/showthread.php?t=997506

Worked my way through this.

I can see output supposedly passing through pulseaudio when playing a test tone from System -> Preferences -> Sound but can't hear any output.

Pulseaudio crashed shortly after.

Jan 6 12:59:29 cotterpin pulseaudio[6365]: ltdl-bind-now.c: Failed to find original dlopen loader.
Jan 6 12:59:29 cotterpin pulseaudio[6367]: main.c: setrlimit(RLIMIT_NICE, (31, 31)) failed: Operation not permitted
Jan 6 12:59:29 cotterpin pulseaudio[6367]: main.c: setrlimit(RLIMIT_RTPRIO, (9, 9)) failed: Operation not permitted
Jan 6 12:59:44 cotterpin pulseaudio[6367]: module-x11-xsmp.c: X11 session manager not running.
Jan 6 12:59:44 cotterpin pulseaudio[6367]: module.c: Failed to load module "module-x11-xsmp" (argument: ""): initialization failed.