I use the same as you do , Creative SoundBlaster Audigy 2 NX (USB) and the same module snd_usb_audio. I have installed the CPU governor POWERNOWD and on AC I have setup for performance and on battery on demand, and in booth modes still have the bug. And yes I get it consistently but in random times.
-- Multimedia playback broken with pulseaudio and alsa https://bugs.launchpad.net/bugs/223103 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs