PCI Sound Card SB0240 is installed but not visible in Audio Mixer

[Adam Mazurkiewicz]

I cannot make my music card to work. The model is Creative Labs Sound
Blaster Audigy 2 PCI Sound Card SB0240. It works on Debian but GuixSD.

When I click Volume and Audio mixer on my Xfce Desktop, in an Output
Devices tab an information is displayed: No output devices available.

But the system apparently sees the card:


s@s ~$ lspci |grep EMU
01:00.0 Multimedia audio controller: Creative Labs
EMU10k2/CA0100/CA0102/CA10200 [Sound Blaster Audigy Series] (rev 04)
s@s ~$ sudo dmesg |grep EMU
[    4.416002] gameport gameport0: EMU10K1 is
pci0000:01:00.1/gameport0, io 0xcc00, speed 874kHz
s@s ~$ guix describe
Generation 2    Jun 09 2019 21:58:21    (current)
  guix 597ab33
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 597ab33d6ba19a8754da265e6b19ba6ad69d0144
s@s ~$
So how to fix it?