[9.10 regression] HDA power_save=10

Binary package hint: pulseaudio

I'm using Karmic beta.

During boot and also when logged in, also before starting any application, I have cracking sound coming out of my speakers every some seconds.
More strange, if I switch off the speakers then I can hear the same cracks from the internal speakers (it's an HP laptop) even if the jack is plugged in. Seems like something electrical, but must be caused by some software problem as the problem is not present on Windows neither it was on Jaunty (though I switched off Pulseaudio, IIRC).

ProblemType: Bug
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/pcmC0D0c: fredp 4728 F...m pulseaudio
 /dev/snd/pcmC0D0p: fredp 4728 F...m pulseaudio
 /dev/snd/controlC0: fredp 4728 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xde300000 irq 22'
   Mixer name : 'Conexant CX20549 (Venice)'
   Components : 'HDA:14f15045,103c30bb,00100100'
   Controls : 18
   Simple ctrls : 8
Date: Thu Oct 15 18:55:32 2009
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: nvidia
Package: pulseaudio 1:0.9.19-0ubuntu2
ProcEnviron:
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.46-generic
SourcePackage: pulseaudio
Uname: Linux 2.6.31-14-generic i686