Date: Tue, 28 Jul 2026 12:03:45 +0200 From: vermaden <vermaden@interia.pl> To: Tomoaki AOKI <junchoon@dec.sakura.ne.jp>, Adrian Chadd <adrian@freebsd.org> Cc: Nuno Teixeira <eduardo@freebsd.org>, Sulev-Madis Silber <freebsd-current-freebsd-org111@ketas.si.pri.ee>, "freebsd-current@freebsd.org" <freebsd-current@freebsd.org> Subject: Re: Tragic State of FreeBSD Audio/Sound Message-ID: <lbotkinzjdvulwavoluu@bxhl> In-Reply-To: <20260728181029.f4aeaf7a0bfbaf565f3468c6@dec.sakura.ne.jp> References: <hkttyyfmuguexmliuhmg@ewtn> <CALH631mZWS9e9FDXPUT8N8W8WnNnpfYaoPuRyqXhqNTW9=atLw@mail.gmail.com> <CAK7dMtC0f7SgU7k6Yvbqg94eksd5UJ1meX7o2_0ukAteZPb-9g@mail.gmail.com> <20260722085416.407316d393dce1884c29a3c7@dec.sakura.ne.jp> <CAK7dMtBDQTwFkQ2UKgz1LtniZBdaWBnfL4iwUo1kFT5d34xSdQ@mail.gmail.com> <20260724001549.c947af418add25dd00ac0344@dec.sakura.ne.jp> <CAK7dMtBO4C5H9uexDfLjzL-ovuXMU8s-t5D-rTDxJcfNq%2BAMmg@mail.gmail.com> <20260724193239.d2eb613e0c4f42b90925eb46@dec.sakura.ne.jp> <20260726090359.4082568fe922add2dc01deb2@dec.sakura.ne.jp> <CAJ-VmonRmyrhpmAFkf7dAg2VdVFQKjeYtWMBYPSBvohuGBg-9w@mail.gmail.com> <wizxwdgtrmwqlrhgojon@qeft> <0AC6B63B-2A37-4F8D-BDBD-36D09F584913@ketas.si.pri.ee> <20260727190324.4b14bd9d7581c02c1cb001db@dec.sakura.ne.jp> <CAJ-VmomrsF0TDC7LDP1khyXgMREc98ysmn75NwL8Qm0C7qKnGQ@mail.gmail.com> <CAFDf7UKq92Ke7_DFvtY%2BHLUsy6-Wyi85o4bSQgDE7=R6KxDWSA@mail.gmail.com> <CAJ-Vmok5_mp2_Qak_7ApEdVSS_7Y1cnuY=3HiF8xnUYuD_PF-g@mail.gmail.com> <20260728181029.f4aeaf7a0bfbaf565f3468c6@dec.sakura.ne.jp>
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Hi. Temat: Re: Tragic State of FreeBSD Audio/Sound Data: 2026-07-28 11:12 Nadawca: "Tomoaki AOKI" <junchoon@dec.sakura.ne.jp> Adresat: "Adrian Chadd" <adrian@freebsd.org>; DW: "Nuno Teixeira" <eduardo@freebsd.org>; "Sulev-Madis Silber" <freebsd-current-freebsd-org111@ketas.si.pri.ee>; freebsd-current@freebsd.org; > > > On Mon, 27 Jul 2026 20:24:09 -0700 > Adrian Chadd wrote: > >> On Mon, 27 Jul 2026 at 15:09, Nuno Teixeira wrote: >> > >> > >> >> If you're experiencing "buzz" like I think you are then it's the same >> >> frame being queued >> >> over and over again to the DAC. Typically I've only seen that happen here when I >> >> have the kernel panic (we're not stopping audio DMA at this point, and >> >> I don't know >> >> why it's looping over.) >> >> >> >> >> >> >> >> Even in the year of our lord "LLMs are available" there's only so much >> >> one can do >> >> in long email threads; at some point bugs need reproducing, PRs need filing and >> >> developer / user time needs to happen. Let's be methodical about it to help out >> >> the sound folks in figuring it out. >> >> >> >> >> >> >> >> -adrian >> >> >> > >> > Hello, >> > >> > I usually linten to youtube when doing poudriere builds. Music helps the process and poudriere build better. >> > >> > I use an usb dac with: >> > >> > hw.snd.latency=10 >> > hw.usb.uaudio.buffer_ms=8 >> > >> > IMHO it helps a little. >> >> neat. again, if you can reproduce this then please file a bug, include >> information about your hardware >> and what you're doing on it to elicit the terrible behviour. >> >> >> >> >> -adrian > > In my case, the issue rarely (about once per several months, including > "stop playing" cases) happens, thus, hard to reproduce. > > Possibly (too wild guess, though) race conditions between > *I/O pressures by heavy poudriere builds > *timing to send payload to USB audio > *timing to send/receive I/O from/to USB peripherals > *reading audiofile (in my case, mostly FLAC) > *processing audio data to send to USB audio > > In some cases, buzz sounds. In some other cases, sound stops, > but audacious thinks it's sanely playing (slider moves, > spectrum moves). I think the "sound stops" case would be > PCM payload to USB audio is clamped to zero, instead of > random value for buzz cases. > > Creating reproducer may be... too hard for me. > > Regards. > > -- > Tomoaki AOKI My ideas to 'stress' system to make it happen - fire up all of these at once: # glmark2 # unixbench # sysbench cpu --threads=$( nproc ) run # blogbench # stress-ng # make buildworld Should help ... Regards, vermadenhome | help
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