[pulseaudio-tickets] [Bug 49608] periodic audio skips with Intel HDA

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49608

--- Comment #38 from rkfg <rkfg at rkfg.me> ---
I have them with 4 fragments of 1 ms each. tsched=0,
device.buffering.buffer_size = "768", device.buffering.fragment_size = "128":

[11966.628405] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=72,
new_hw_ptr=1177, old_hw_ptr=1105)
[11966.636364] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=72,
new_hw_ptr=1521, old_hw_ptr=1449)
[11966.668090] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=72,
new_hw_ptr=505, old_hw_ptr=433)
[11966.671573] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=79,
new_hw_ptr=672, old_hw_ptr=593)
[11966.676095] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=72,
new_hw_ptr=889, old_hw_ptr=817)
[11966.681435] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=56,
new_hw_ptr=1145, old_hw_ptr=1089)
[11966.686940] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=80,
new_hw_ptr=1409, old_hw_ptr=1329)
[11966.689460] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=80,
new_hw_ptr=1529, old_hw_ptr=1449)
[11966.692775] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=80,
new_hw_ptr=1689, old_hw_ptr=1609)
[11966.696944] ALSA: PCM: [Q] Lost interrupts?: (stream=0, delta=80,
new_hw_ptr=1889, old_hw_ptr=1809)

# cat /sys/module/snd_hda_intel/parameters/align_buffer_size
1

It has also printed this in the PA's log: http://pastebin.com/jAQx6DEZ

> ALSA woke us up to write new data to the device, but there was actually nothing to write! Most likely this is a bug in the ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA developers. We were woken up with POLLOUT set -- however a subsequent snd_pcm_avail() returned 0 or another value < min_avail.

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