I have a Lenovo Ideapad 14'' 100S IBR-14'' Intel Celeron CPU N3060 @ 1.60GHz, 32GB SSD, 4GB RAM running FreeBSD 12.0.

I am trying to setup sound on it. I set it up in /boot/loader.conf as:

# load sound driver
# load mixer

However, when trying to playing sound both in youtube or in the command line, I get this error, either when trying to use the Speaker or the Headphones channel:

pcm0: chn_write(): pcm0:virtual:dsp0.vp0: play interrupt timeout, channel dead


pcm1: chn_write(): pcm1:virtual:dsp1.vp0: play interrupt timeout, channel dead

The mixer seems to be ok:

# mixer
Mixer vol  is currently set to 100:100
Mixer pcm  is currently set to 100:100

To see the available outputs:

$ cat /dev/sndstat
Installed devices:
pcm0: <Realtek ALC269 (Right Analog)> (play/rec)
pcm1: <Realtek ALC269 (Internal Analog)> (play/rec) default
pcm2: <Intel (0x2883) (HDMI/DP 8ch)> (play)
No devices installed from userspace.

What to do?

1 Answer 1


To get the sound working, according to a similar post in the FreeBSD forums, you have to do:

sudo sysctl dev.hdac.0.polling=1

After this change, the sound started working while using the headphone jack (Right Analog).

To output sound from the internal speakers (Internal Analog), I had to do:

sudo sysctl hw.snd.default_unit=1

To have these configurations at boot time, add them to /etc/sysctl.conf:


See also:

FreeBSD: no automatic switching between sound in speaker and built-in headphones jack

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