default-fragments = 2
default-fragment-size-msec = 5

in daemon.conf, and

load-module module-alsa-sink tsched=0     (only needed if using acpi,
acpi=off or apm works nice without it)

in default.pa helped me on thinkpad 570e with snd_cs46xx ( 00:05.0
Multimedia audio controller: Cirrus Logic CS 4614/22/24/30 [CrystalClear
SoundFusion Audio Accelerator] (rev 01) )

I'm on Debian, tested on 2.6.32 and 2.6.35 kernels. Pulseaudio 0.9.21-3

note: if you want to use APM with grub2 and get "apm: bios not found"
error, try

--- before/10_linux     2010-12-02 19:03:54.000000000 +0300
+++ after/10_linux      2010-12-02 19:03:58.000000000 +0300
@@ -79,12 +79,12 @@
   printf '%s\n' "${prepare_boot_cache}"
   cat << EOF
        echo    '$(printf "$(gettext_quoted "Loading Linux %s ...")" 
${version})'
-       linux   ${rel_dirname}/${basename} 
root=${linux_root_device_thisversion} ro ${args}
+       linux16 ${rel_dirname}/${basename} 
root=${linux_root_device_thisversion} ro ${args}
 EOF
   if test -n "${initrd}" ; then
     cat << EOF
        echo    '$(gettext_quoted "Loading initial ramdisk ...")'
-       initrd  ${rel_dirname}/${initrd}
+       initrd16        ${rel_dirname}/${initrd}
 EOF
   fi
   cat << EOF


$ update-grub
$reboot

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https://bugs.launchpad.net/bugs/428619

Title:
  pulseaudio crackle/distortion with cs46xx on latest update

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