Comment 16 for bug 1274401

Daniel,

Testing under Ubuntu 13.10 allows the use of the internal sub-woofer. The sub-woofer controls in the Sound settings are still not usable, but using the slider for Fade from rear to front speakers under the Analog Surround 4.0 Output mode allows for panning between the two internal speakers near the monitor and the internal sub-woofer near the front of the keyboard (towards the user). Using Test Sound also makes it apparent that the internal sub-woofer is now being recognized as the Rear Left and Rear Right speakers.

Raymond,

Here are the outputs for the commands you requested that I run:

Command: "sudo hda-verb /dev/snd/hwC0D0 0x3e 0xf00 0x9"
Output: nid = 0x3e, verb = 0xf00, param = 0x9
                value = 0x200500

Command: "sudo hda-verb /dev/snd/hwC0D0 0x3e 0xf00 0xe"
Output: nid = 0x3e, verb = 0xf00, param = 0xe
                value = 0x1

Command: "sudo hda-verb /dev/snd/hwC0D0 0x3e 0xf02 0x0"
Output: nid = 0x3e, verb = 0xf02, param = 0x0
                value = 0x1c