Hello, I've been successfully using a self compiled linux kernel until version 3.19 together with Debian Stretch. After upgrading the kernel to version 4.0 I see strange messages in the logs i.e. May 27 22:44:01 pulseaudio[1027]: [alsa-sink-3830000.i2s-HiFi HiFi-0] alsa-sink.c: ALSA woke us up to write new data to the device, but there was actually nothing to write! May 27 22:44:01 pulseaudio[1027]: [alsa-sink-3830000.i2s-HiFi HiFi-0] alsa-sink.c: Most likely this is a bug in the ALSA driver 'snd_soc_simple_card'. Please report this issue to the ALSA developers. May 27 22:44:01 pulseaudio[1027]: [alsa-sink-3830000.i2s-HiFi HiFi-0] alsa-sink.c: We were woken up with POLLOUT set -- however a subsequent snd_pcm_avail() returned 0 or another value < min_avail. I can easily play sound in perfect quality for approx the first 24h. After that time the sound becomes distorted and is choppy/crackling. After rebooting then the sound is optimal again. I have tried to use kernel 4.0 with almost exactly the same configuration than for 3.19 to no avail. Then somebody on http://forum.odroid.com/viewtopic.php?f=82&t=13281&p=91186 gave me the hint that the followin patch might solve the issue: https://github.com/prahal/linux/commit/5e60cfc9fa5101a346e29ef5f944fbbad300c72d The patch did help something. I can now still play music after 2 days but what happens is that each time I turn on music I get a choppy sound for some time. That means the sound comes clear but every 2 seconds the sound pauses for a fraction of a second. Which is somewhat comparable to the issue earlier but without the heavy crackling - and that this goes away after a couple of minutes. But furthermore the sound has now simple cracklings. One in two second approx. and they do not disappear. Does anybody have an idea what could be the matter here? Thanks in advance. Gabriel -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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