I'm experiencing an odd problem with PulseAudio on Ubuntu Karmic 9.10-a6. I wasn't quite sure what was happening, but I made a video that hopefully better illustrates the problem. I'm hopeful that someone can point me to a simple solution, or recommend a bug-fix. There isn't any audio, which is fine, but in particular take note of what PulseAudio is doing to the ALSA mixer. http://www.vimeo.com/6825531 This is the problem I'm having on my laptop, with Karmic and PulseAudio on a SigmaTel STAC9200 audio chipset (Dell Precision M90). When using the volume keys on the front of the laptop, the volume levels on the ALSA mixer adjust the Master first, and then after muting Master, subsequently adjust the PCM and LFE levels. On my laptop, this results in very little volume control, and an overly bassy response as the LFE is maintained at full volume, while the master levels are dropped. Near the bottom of the volume range on the Notify window, the master volume is muted. Eventually the PCM and LFE levels are lowered through the last few 'presses' of the volume keys, and finally muted. Any help, suggestions, or ideas would be appreciated. I use my laptop for video editing, and a fubared audio mixer is really a deal-breaker. Thanks, Kyle Mallory
