Comment 8 for bug 1093792

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