you can use hda-verb to set the power state http://git.alsa-project.org/?p=alsa-tools.git;a=blob;f=hda- verb/README;hb=HEAD
can you post the output of alsa-info.sh for your HP Envy Sleekbook 6-1129wm using model=auto ? there are other possible pin complexes (0xa, 0xc, 0xe and 0xf) for the subwoofer beside the mono pin node 0x10 you can use hda-jack-retask to change the node one by one if node 0x10 is not the subwoofer !!Sysfs Files !!----------- /sys/class/sound/hwC0D0/init_pin_configs: 0x0a 0x40f000f0 0x0b 0x0421101f 0x0c 0x04a11020 0x0d 0x92170110 0x0e 0x40f000f0 0x0f 0x40f000f0 0x10 0x40f000f0 0x11 0xd5a30130 0x1f 0x40f000f0 0x20 0x40f000f0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1093792 Title: [HP ENVY 4 Notebook PC, IDT 92HD91BXX, Speaker, Internal] Playback problem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1093792/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs