[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 #27 from Raymond <superquad.vortex2 at gmail.com> ---
http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/src?id=826c8f69d34ef49e86fe0ab6c93c1ffba8916131


it is this patch disable timer scheduling , but your result indicate the
granularity seem better than period size



PCM Devices which have the BATCH flag set update the PCM pointer only with
period size granularity. Using timer based scheduling does not have any
advantage in this mode. For one devices which have that flag set usually update
the position pointer in software after getting the period interrupt. 

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/usb?id=49045d3d4dc7c43310b1fca693e29fcdbe68faba

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