Stuttering audio with ice1712

[dennisj]

I tried moving to the new pulseaudio in Fedora Rawhide (plus kernel and alsa) today but with that version I only get stuttering audio on both my soundcard and on-board soundchip.

The soundcard is an Audiophile 24/96 (ice1712) that requires a custom channel-map setup in default.pa but otherwise works fine with PA 0.9.10. The on-board audio is identified by alsa as "HDA-Intel - HDA NVidia".

Both cards play the audio but there are regular outages about every second. While these outages happen during playback I get this message from PA with the same frequency:

D: sink-input.c: Have to rewind 22512 bytes on render memblockq.
D: protocol-native.c: Requesting rewind due to end of underrun.
D: module-alsa-sink.c: Requested to rewind 23836 bytes.
D: module-alsa-sink.c: Limited to 21964 bytes.
D: module-alsa-sink.c: before: 5491
D: module-alsa-sink.c: after: 5491
D: module-alsa-sink.c: Rewound 21964 bytes.
D: sink.c: Processing rewind...

These messages repeat with slightly changing numbers as long as I play back a file. Also I see the message "pcm_hw.c: SNDRV_PCM_IOCTL_DRAIN failed" in the log but not in regular intervals like the one above.

Full "pulseaudio -vvv" log attached including initialization and and bit of playback data and shutdown.

[dennisj]

pulseaudio -vvv log

[coling]

I saw a patch for "data coherence" on the alsa ML the other day for HDA Nvidia chips... Not sure if that's you or what "data coherence" really is (A guess a liberal interpretation could be "stuttering fix"), but perhaps it fixes things for you? http://permalink.gmane.org/gmane.linux.kernel/716183

This is a long shot.

[dennisj]

That sounds unlikely because the Audiophile card has exactly the same problem suggesting that the problem lies not in the individual drivers but some bits of code both drivers share.