[pulseaudio-tickets] [Bug 86262] severe underruns with usb audio, works with pa 3.0 - buffer setup seems wrong

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86262

--- Comment #3 from Raymond <superquad.vortex2 at gmail.com> ---
info_batch mean driver can only report hwptr at period boundary 


+I: [pulseaudio] alsa-sink.c: Using 4.0 fragments of size 4408 bytes (24.99ms),
buffer size is 17632 bytes (99.95ms)


this mean pulseaudio configure usb audio using fix latency at 4 * 24.99 ms by
default

pulseaudio should reject client requset  any latency below 99.95ms


[pulseaudio] sink-input.c:     module-stream-restore.id =
"sink-input-by-media-role:phone"
I: [pulseaudio] protocol-native.c: Requested tlength=20.00 ms, minreq=4.99 ms
D: [pulseaudio] protocol-native.c: Adjust latency mode enabled, configuring
sink latency to half of overall latency.
D: [pulseaudio] protocol-native.c: Requested latency=5.01 ms, Received
latency=99.95 ms
D: [pulseaudio] memblockq.c: memblockq requested: maxlength=4194304,
tlength=9696, base=2, prebuf=9258, minreq=440 maxrewind=0
D: [pulseaudio] memblockq.c: memblockq sanitized: maxlength=4194304,
tlength=9696, base=2, prebuf=9258, minreq=440 maxrewind=0

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