Is this with tsched=0? I wonder why PA gets the position information so
often. Without tsched change, PA should access to the hardware much
less frequently.
In anyway, one another interesting experiment is to reduce the max
period size, something like below on top of the previous patch:
--- a/sound/pci/hda/hda_controller.c
+++ b/sound/pci/hda/hda_controller.c
@@ -607,6 +607,7 @@ static int azx_pcm_open(struct snd_pcm_substream *substream)
runtime->hw.channels_max = hinfo->channels_max;
runtime->hw.formats = hinfo->formats;
runtime->hw.rates = hinfo->rates;
+ runtime->hw.period_bytes_max = 32768; // XXX
snd_pcm_limit_hw_rates(runtime);
snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
This is merely a hackish workaround, but worth to try.
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https://bugs.launchpad.net/bugs/1801540
Title:
Microphone distorted sound on ALC892/1220 on AMD chipsets
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