Comment 73 for bug 204536

Trying the ALSA and PULSE audio settings recommended on various sites had a strange result: the volume icon and slider show the preset volume (~40%) after boot, but the real, I mean audible volume is @ 100%. Simply clicking the volume slider will set the volume right.
Another strange thing: today the clock/calendar items did't appear on startup, and the real volume was correct (40%)!
Bringing back the clock with sudo killall unity-panel-service the volume reset to 100% while the slider still showed 40%.

Ubuntu 13.10 64-bit, Intel HDA, DisplayPort