(In reply to Marco from comment #180)
> (In reply to Takashi Iwai from comment #172)
> > Thanks. The problem with playback indicates that the delay correction
> isn't
> > good for playback but only for capture.
> >
> > Below is yet another revised patch. It corrects the position report only
> > for the capture, but takes the FIFO delay into account, too.
>
> With tsched=0, everything is perfect. When tsched=0 is removed, the audio
> output is not crackling again, however ALL audio is retarded when the
> acquisition starts, to me it feels around 4/5 seconds. I had a player
> playing music in background and the whole stream jump back for that time; if
> i try to seek in another position the audio will seek only after the same
> 4/5 seconds. If I stop capturing audio, the playback sync back again and the
> playback is working correctly again.
>
> Very weird.
So something goes wrong in the full-duplex operation? That is, if you
do only capture or only playback, it works even without tsched
workaround?
Another shot-in-the-dark is to swap the stream assignment, something
like:
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1853,8 +1853,8 @@ static int azx_first_init(struct azx *chip)
break;
}
}
- chip->capture_index_offset = 0;
- chip->playback_index_offset = chip->capture_streams;
+ chip->playback_index_offset = 0;
+ chip->capture_index_offset = chip->playback_index_offset;
chip->num_streams = chip->playback_streams + chip->capture_streams;
/* sanity check for the SDxCTL.STRM field overflow */
It's unlikely that this has any effect, but who knows...
Another quirk regarding the stream assignment is
AZX_DCAPS_SEPARATE_STREAM_TAG flag, which is used for the recent Intel
chips. Check whether it gives any positive changes.
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https://bugs.launchpad.net/bugs/1801540
Title:
Microphone distorted sound on ALC892/1220 on AMD chipsets
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