I have a 2.1 speakers system that was working fine on Windows 7.
I just installed Ubuntu 14.04 LTS and now just the front-left and front-right speakers are working. The subwoofer is not working.
In the Sound Settings, there is just one option: "Analog Output (Built-in Audio)" where the subwoofer control is disabled and in the "Test sound" window I can only see "Front left" and "Front right" speakers.
I have already tried:
enable-lfe-remixing = yes default-sample-channels = 3 default-channel-map = front-left,front-right,lfe
Result: no changes
load-module module-combine channels=3 channel_map=front-left,front-right,lfe
enable-lfe-remixing = yes
Result: another option appeared in the Sound Settings: "Simultaneous output to Caicos HDMI Audio [Radeon HD 6400 Seris] Digital Stereo (HDMI), Buil-in Audio Analog Stereo". Within it, when I clicked "Test Sound", a new option appeared - "Subwoofer". But the sound was played by the 2 front speakers, and the subwoofer is still not working.
Does anybody have any idea?