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Date:      Wed, 8 Oct 2014 13:42:14 -0700
From:      David Benfell <benfell@parts-unknown.org>
To:        freebsd-questions@freebsd.org
Subject:   How do I tell which driver I need for sound?
Message-ID:  <20141008204214.GA93107@home.parts-unknown.org>

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Hi all,

Yes, sound works, at least most of the time. But this is the
out-of-the-box configuration and so I assume I'm loading more drivers
than I need. Here's what I've got:

FreeBSD home.parts-unknown.org 10.1-BETA3 FreeBSD 10.1-BETA3 #0 r272441: Th=
u Oct  2 13:05:04 PDT 2014     root@home.parts-unknown.org:/usr/obj/usr/src=
/sys/GENERIC  amd64
Installed devices:
pcm0: <Intel Haswell (HDMI/DP 8ch)> (play)
pcm1: <Realtek ALC662 (Rear Analog)> (play/rec) default

I'm using the Realtek. Here are the sound modules I have loaded:

 7    1 0xffffffff81a3c000 4068     snd_driver.ko
 8    2 0xffffffff81a41000 8aa0     snd_vibes.ko
 9    2 0xffffffff81a4a000 7990     snd_via82c686.ko
10    2 0xffffffff81a52000 8480     snd_t4dwave.ko
11    4 0xffffffff81a5b000 28c0     snd_spicds.ko
12    2 0xffffffff81a5e000 a7e0     snd_solo.ko
13    5 0xffffffff81a69000 6118     snd_sbc.ko
14    2 0xffffffff81a70000 8198     snd_sb8.ko
15    2 0xffffffff81a79000 8200     snd_sb16.ko
16    2 0xffffffff81a82000 14f90    snd_neomagic.ko
17    3 0xffffffff81a97000 169e0    snd_mss.ko
18    2 0xffffffff81aae000 e808     snd_maestro3.ko
19    2 0xffffffff81abd000 eb10     snd_maestro.ko
20    2 0xffffffff81acc000 7328     snd_fm801.ko
21    2 0xffffffff81ad4000 a920     snd_ess.ko
22    2 0xffffffff81adf000 c978     snd_envy24ht.ko
23    2 0xffffffff81aec000 e130     snd_envy24.ko
24    2 0xffffffff81afb000 fe80     snd_ds1.ko
25    2 0xffffffff81b0b000 8c60     snd_cs4281.ko
26    2 0xffffffff81b14000 a390     snd_atiixp.ko
27    2 0xffffffff81b1f000 8f80     snd_als4000.ko
28    2 0xffffffff81b28000 b928     snd_ad1816.ko

For some reason, sound has stopped working and I assume I should
reload the driver. But which one?

Thanks!
--=20
David Benfell <benfell@parts-unknown.org>
See https://parts-unknown.org/node/2 if you don't understand the
attachment.

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