My samsung NC20 after upgrade from 9.04 to 9.10 beta had the same problem (booting 9.10beta from a life USB-stick was ok).
I removed all the .pulse* files from my home directory and sound was fully ok after a reboot...
My samsung NC20 after upgrade from 9.04 to 9.10 beta had the same problem (booting 9.10beta from a life USB-stick was ok).
I removed all the .pulse* files from my home directory and sound was fully ok after a reboot...