it is strange that pulseaudio select your USB audio device as default sink when there is no volume control
the null autoconfig may be related to modem codec Codec: Conexant ID 2bfa Address: 1 MFG Function Id: 0x2 (unsol 1) Vendor Id: 0x14f12bfa Subsystem Id: 0x104d0200 Revision Id: 0x90000 Modem Function Group: 0x2 seem driver overwrite some pin setup Sysfs Files !!----------- /sys/class/sound/hwC0D0/init_pin_configs: 0x0a 0x02211030 0x0b 0x400000fb 0x0c 0x21211040 0x0d 0x02a1502e 0x0e 0x50370060 0x0f 0x90171110 0x11 0x21451040 0x13 0x40c000fd 0x14 0x90a71020 /sys/class/sound/hwC0D0/driver_pin_configs: 0x0a 0x03211020 0x0b 0x411111f0 0x0c 0x411111f0 0x0d 0x03a15030 0x0e 0x411111f0 0x0f 0x90170110 0x11 0x411111f0 0x13 0x411111f0 0x14 0x90a7013e /sys/class/soun -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1354721 Title: impossible reproduce files correctly [USB-Audio - io|2, playback] Underruns, dropouts or crackling sound To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1354721/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
