I guess I found a fix for this problem (at least the message disapears from the log)
It's definitely a bug in CS46xx driver. I've changed the test for the ring buffer pointer to be in range 0 .. buffer_size-1 . pointer equal to buffer_size doesn't make any sense and it should be really zero.
in cs46xx_lib.c in snd_cs46xx_playback_indirect_pointer(...) function:
if (bytes < 0)
bytes += buffer_size;
cpcm->hw_io = ptr;
cpcm->hw_ready -= bytes;
cpcm->sw_io += bytes;
- if (cpcm->sw_io > cpcm->sw_bufsize)
+ if (cpcm->sw_io >= cpcm->sw_bufsize)
cpcm->sw_io -= cpcm->sw_bufsize;
snd_cs46xx_playback_transfer(substream, 0);
I cant hear any difference in sound quality, maybe it's just not posible to hear the difference ...
... and now it's too late, i'll continue tomorrow ...
/Benny
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