Date: Sun, 29 Sep 2024 12:09:24 +0200 From: Alban Hertroys <haramrae@gmail.com> To: freebsd-stable@freebsd.org Subject: uaudio device re-attach and persisting dev.pcm.$pcm.bitperfect sysctl Message-ID: <F61ECC96-6FCB-4A4E-9EEC-8D6AF31A8A62@gmail.com>
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Hello, I am generally rather happy with this change in 14.1-RELEASE: "Audio now supports asynchronous device detach. This greatly simplifies = hot plugging and unplugging of things such as USB headsets, and eases = use of PulseAudio in cases that require operating system sleep and wake = (suspend and resume). d692c314d29a (Sponsored by The FreeBSD = Foundation)" It allows me to play music over my USB DAC through musicpd, without = needing virtual-oss anymore, resulting in lower CPU load and potentially = higher bit-rates (voss doesn=E2=80=99t go beyond 192kHz). Much = appreciated. It=E2=80=99s almost perfect now, BUT=E2=80=A6 I have a number of sysctl=E2=80=99s in /etc/sysctl.conf to tune my audio = output: hw.snd.default_unit=3D2 hw.snd.maxautovchans=3D0 dev.pcm.2.play.vchans=3D0 dev.pcm.2.bitperfect=3D1 These do get set properly after booting the machine, but after I turn = off my audio equipment (the DAC among them) and turn them back on the = next day, I see: #> sysctl -i dev.pcm.2.%desc dev.pcm.2.play.vchans dev.pcm.2.bitperfect=20= dev.pcm.2.%desc: Topping D90SE dev.pcm.2.play.vchans: 0 dev.pcm.2.bitperfect: 0 <--- Supposed to be 1! Is there a way to persist those settings when re-attaching the device? Frankly, I am a bit confused about why this apparently wasn=E2=80=99t a = problem before (14.0-RELEASE with virtual-oss), perhaps I just never = noticed and this isn=E2=80=99t a new problem with 14.1. I only started = monitoring this setting relatively recently. The periodic security run output reports the detach/attach sequence = quite correctly (as far as I can tell) as: +ugen0.6: <Topping D90SE> at usbus0 (disconnected) +uaudio0: at uhub4, port 4, addr 8 (disconnected) +pcm2: detached +uaudio0: detached +uhid3: at uhub4, port 4, addr 8 (disconnected) +uhid3: detached +ugen0.6: <Topping D90SE> at usbus0 +uaudio0 on uhub4 +uaudio0: <Topping D90SE, class 239/2, rev 2.00/1.88, addr 9> on usbus0 +uaudio0: Play[0]: 384000 Hz, 2 ch, 32-bit S-LE PCM format, 2x4ms = buffer. (selected) +uaudio0: Play[0]: 352800 Hz, 2 ch, 32-bit S-LE PCM format, 2x4ms = buffer. +uaudio0: Play[0]: 192000 Hz, 2 ch, 32-bit S-LE PCM format, 2x4ms = buffer. +uaudio0: Play[0]: 176400 Hz, 2 ch, 32-bit S-LE PCM format, 2x4ms = buffer. +uaudio0: Play[0]: 96000 Hz, 2 ch, 32-bit S-LE PCM format, 2x4ms buffer. +uaudio0: Play[0]: 88200 Hz, 2 ch, 32-bit S-LE PCM format, 2x4ms buffer. +uaudio0: Play[0]: 48000 Hz, 2 ch, 32-bit S-LE PCM format, 2x4ms buffer. +uaudio0: Play[0]: 44100 Hz, 2 ch, 32-bit S-LE PCM format, 2x4ms buffer. +uaudio0: No recording. +uaudio0: No MIDI sequencer. +pcm2 on uaudio0 +uaudio0: No HID volume keys found. +uhid3 on uhub4 +uhid3: <Topping D90SE, class 239/2, rev 2.00/1.88, addr 9> on usbus0 Regards, Alban Hertroys -- There is always an exception to always.
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