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decuser/fbsd-11-imac-2008-audio.txt

Created December 14, 2021 16:01
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  1. decuser created this gist Dec 14, 2021.
    41 changes: 41 additions & 0 deletions fbsd-11-imac-2008-audio.txt
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    Issue with sound in FBSD 11.1 on 20" iMac Early 2008 (iMac8,1)

    I recently (yesterday) installed FreeBSD 11.1 as the sole OS on my iMac.
    I have KDE installed and working.
    I tried a youtube video in firefox, and no sounds came from the speakers (which worked fine in Mac OS X)
    I tried sudo cat /dev/random /dev/dsp, and no sound

    Here are loader.conf, sndstat, and dmesg messages that seem to indicate "it oughta work"

    How should I go about finding out if there is a misconfiguration?

    sudo cat /boot/loader.conf
    ...
    snd_hda_load="YES"

    sudo cat /dev/sndstat
    Installed devices:
    pcm0: <Realtek ALC889A (Internal Analog 3.1/2.0)> (play/rec) default
    pcm1: <Realtek ALC889A (Rear Analog)> (play/rec)
    pcm2: <Realtek ALC889A (Rear Digital)> (play/rec)
    No devices installed from userspace.

    dmesg|grep pcm
    pcm0: <Realtek ALC889A (Internal Analog 3.1/2.0)> at nid 20,22 and 24 on hdaa0
    pcm1: <Realtek ALC889A (Rear Analog)> at nid 21 and 26 on hdaa0
    pcm2: <Realtek ALC889A (Rear Digital)> at nid 30 and 31 on hdaa0


    Here are some relevant system specs:
    iMac 20 inch Aluminum, early 2008, iMac8,1
    Native Resolution - 1680x1050 32-Bit Color
    Intel Core 2 Duo, 2.4 GHz
    6GB 800MHz DDR 2 SDRAM
    ATI Radeon HD 2400 PCIe GPU 128MB VRAM
    Intel High Definition Audio

    Solution:
    sudo vi /boot/device.hints
    hint.hdaa.0.config="ovref"
    hint.hdaa.0.gpio_config="0=set"
    hint.hdaa.0.nid20.config="as=4 seq=15"