How to set default pcm device?
erisianash at gmail.com
Sun Feb 4 03:43:34 UTC 2018
Typing this on my phone. Sorry if the formatting isn't right.
On February 3, 2018 12:44:30 PM PST, Christian Weisgerber <naddy at mips.inka.de> wrote:
>After boot, my /dev/sndstat looks like this:
>pcm0: <ATI R6xx (HDMI)> (play)
>pcm1: <Realtek ALC280 (Analog 2.0+HP/2.0)> (play/rec) default
>pcm2: <Realtek ALC280 (Rear Analog)> (play/rec)
>pcm3: <USB audio> (play)
>No devices installed from userspace.
>However, I would like the USB audio device, pcm3, to be the default
>sound unit. How do I set this persistently across reboots?
>The traditional solution was to set hw.snd.default_unit=3 in
>/boot/loader.conf. That worked for FreeBSD 10.x, but with 11.x the
>USB devices are attached very late and the boot loader setting
>(which I still have) is effectively ignored. Loading the uaudio
>module early with snd_uaudio_load=YES doesn't change this. Setting
>hw.snd.default_unit in /etc/sysctl.conf is unlikely to work either;
>certainly it's a race.
hw.snd.default_unit is actually a sysctl and should go in /etc/sysctl.conf
You night also consider setting hw.snd.default_auto=2 to automatically select the most recently attached device.
This is documented in the sound(4) man page.
>Do I need to define a devd(8) action for when uaudio attaches or
>is there a better way?
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