shanta, try installing the 'linux-backports-modules-alsa-karmic-generic' package and reboot. After reboot, be sure to double-check the mute status of the output devices in the audio mixer.
shanta, try installing the 'linux- backports- modules- alsa-karmic- generic' package and reboot. After reboot, be sure to double-check the mute status of the output devices in the audio mixer.