On 09-Feb-01 Mike Holling wrote:
>> i have Ensoniq ES1371-based soundcard supported by pcm driver and
>> experience some problems. the sound played is interruped by clicks and
>> distorsions, and they appear more often when the disk activity is high.
>> during playback the kernel generates messages like 'pcm0: hwptr went
>> backwards 64 -> 32'. any ideas?
>
> I have similar problems, except the disruptions only seem to occur during
> keyboard activity. I ran a cvsup while using mpg123 and had no problems,
> which is pretty impressive since the machine is a P133. However, even a
> small amount of typing causes noticeable audio glitches. This happens
> both with a ES1371 and an old SB16 ISA card. It seems I may also be
> losing keystrokes from the keyboard, though I haven't confirmed it's not a
> problem with the keyboard itself.
This could be related to the entropy gathering by the random kthread. Have you
tried removing the random device from your kernel?
> - Mike
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