Confirmed - I just tested Mixxx 1.6.1 on stock Ubuntu Jaunty, HP ze2000 laptop, on-board ATI IXP sound card. Choosing buffers below 16ms with ALSA does cause hangs. Using OSS I can get down to 2ms without problems.
However on Mixxx 1.6.1 on 64 Studio 3.0 beta 3, which is Ubuntu Hardy LTS based with our own kernel, I can get down to 2ms using ALSA with no problems (albeit on different hardware, with intel8x0 onboard sound). I will run further tests to narrow this down.
Confirmed - I just tested Mixxx 1.6.1 on stock Ubuntu Jaunty, HP ze2000 laptop, on-board ATI IXP sound card. Choosing buffers below 16ms with ALSA does cause hangs. Using OSS I can get down to 2ms without problems.
However on Mixxx 1.6.1 on 64 Studio 3.0 beta 3, which is Ubuntu Hardy LTS based with our own kernel, I can get down to 2ms using ALSA with no problems (albeit on different hardware, with intel8x0 onboard sound). I will run further tests to narrow this down.