Sound problems on Dell Vostro 5480 (2.1 sound, only subwoofer working)

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Hi everyone,

I'm using Fedora 22 on my Dell Vostro 5480 notebook and I don't know what is happening to my audio. The volume is very low and only the subwoofer seems to be working. Of course, I already checked alsamixer to see if anything was muted. The HDMI sound and the headphones are working ok.

The notebook seems to have two sound cards, but I don't know if that's correct. Here is what I found when running lspci:

00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09) 00:1b.0 Audio device: Intel Corporation Wildcat Point-LP High Definition Audio Controller (rev 03)

You can see the full output of alsa-info.sh --no-upload here[1]. Does anyone know what's happening and how to fix it?

Thanks,

Paulo Castro

[1] http://hastebin.com/kixaqaloqe.vhdl
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