Lehet, h tévedek, de felesleges pulse-t pakolni kubuntura csak a skype miatt. A Kubuntu az arts sound servert használja. Persze esd-n (enlightened sound daemon) keresztül tudod használni arts-ot, így működik pulseaudio-n (mert az képes úgy viselkedni, mintha esd lenne) keresztül is, csak minek?
súgó itt: http://www.skype.com/help/guides/soundsetup_linux.html
"aRts (Advanced Real-time Synthesizer)
This is KDE default. Whenever your aRts sound works, it means that Skype should, too. The only trick is to run Skype through artsdsp program.
You should start Skype as follows: in the directory where skype executable is located, type:
artsdsp -m ./skype
If your microphone does not work, or you get Segmentation fault when calling, check the full-duplex setting of aRts - in KDE Control Center | Sound & Multimedia | Sound System on Hardware tab there should be a Full duplex option, set it to on ("[x]"), then restart aRts and Skype.
If you hear echo and using aRts, try to decrease your aRts sound buffer size, go to Control Center | Sound & Multimedia | Sound System and decrease Sound buffer size to something under 200ms on General tab in Skip Prevention section."