You have been subscribed to a public bug:
On Asus N551JM there is no sound from external subwoofer on fresh
Kubuntu 14.10 installation. There is no "Bass speaker" in alsamixer.
Adding "options snd-hda-intel model=asus-mode4" to /etc/modprobe.d/alsa-
base.conf makes "Bass speaker" appears in alsamixer but I was unable to
make it play any sound. On Win8 works out-of-box.
Alsa-base version: 1.0.25+dfsg-0ubuntu4.
Howto fix: redirect pin 0x1a to "Internal speaker (back)" using
HDAJackRetask on codec Realtek ALC668. Contents of /lib/firmware/hda-
jack-retask.fw:
[codec]
0x10ec0668 0x1043177d 0
[pincfg]
0x12 0x90a60130
0x14 0x90170110
0x15 0x04211020
0x16 0x40000000
0x18 0x411111f0
0x19 0x411111f0
0x1a 0x90170152
0x1b 0x411111f0
0x1d 0x40c6832d
0x1e 0x411111f0
0x1f 0x411111f0
** Affects: alsa-tools (Ubuntu)
Importance: Undecided
Assignee: Jan Palak (jpalak)
Status: Fix Released
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No sound from subwoofer on Asus N551JM
https://bugs.launchpad.net/bugs/1405691
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Bugs, which is subscribed to alsa-tools in Ubuntu.
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