Matthew Dillon <[EMAIL PROTECTED]> wrote: > > :Playing sound using pcm(4)/snd(4) gives bad quality: hiss > and hops, like sound isn't playing for very short time > periods. Problem is a scratz every 10 seconds; this was easier to hear with 440Hz sinus vs music. > : > :This is experienced: > : - not having SMP in kernel config (eg GENERIC) Ie. no problem when using SMP; but problem is still heard having SMP without APIC_IO. > : - from dfly-1.5 26th December '05 (24th is ok using > kernels from chlamydia); > :including HEAD. > : > :dfly-1.4 is ok, including 1.4.4. > : > :Using audio/mpg123 for MP3, 'cp test.raw /dev/dspW' or > pcmplay for decoded sound. > :Buffering audio data with mpg123 -b doesn't sound like > making any difference. > : > :CPU load doesn't sound like making any difference. > :Problem experienced on several systems, using snd_via8233 > and snd_ich. I was wrong; only one pc experienced problem. (other systems has bad speakers) > : > :No X11 used. > : > : -thomas > > Hmm. That's quite odd. There aren't any significant > source code changes > bewteen the 24th and 26th of December (I diff'd the 23rd > and 27th to be > conservative). > > -Matt > Matthew Dillon > <[EMAIL PROTECTED]> It turns out problem is irq sharing: pcm0/re0 (too any NICs in test box).
>From 26th December '05: when ip-addr is configured on re0 problem is there; no problem without ip-addr configured. Btw: sharing irq pcm0/ath0 (on Thinkpad X32) problem isn't heard. Is irq sharing supported? -thomas
