Date: Tue, 03 May 2022 19:50:41 -0400 From: Mazin Fadl <mazen@illumed.net> To: questions@freebsd.org Subject: Re: get uaudio pcm/mixer device name using devd Message-ID: <86y1ziyx6v.fsf@mars.illumed.net> In-Reply-To: <8635hq1j8c.fsf@mars.illumed.net> References: <8635hq1j8c.fsf@mars.illumed.net>
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I've solved my problem by referencing the kernel log in the action
script to find the pcm/mixer device.
The updated configuration in case it is useful to someone else:
attach 100 {
# find vendor and product ids to match against
# from devinfo(8) or usbconfig(8)
match "vendor" "0x040d";
match "product" "0x340b";
action "/etc/set_usb_audio.sh $device-name";
# for our device gives "uaudioN"
};
in set_usb_audio.sh:
pcm=$(grep -F "$1" /var/log/messages | grep -o 'pcm[[:digit:]]\+' | tail -n1)
if [ -n "$pcm" ]; then
logger set_usb_audio.sh: found usb audio playback on "$pcm"
# set default audio card
mixer -d "${pcm#pcm}" >/dev/null 2>&1
fi
Possible path not taken is to use devinfo(8) output, instead of the
message log, to find the pcm device but this was easiest.
Regards,
mazin
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