I installed Ubuntu 8.04 on my Lenovo 3000 N200 laptop. everything seems to work fine except the sound. i dont hear any sound immediately after booting and while playing music from any players i have Amaraok, Xine etc. With little research on this topic i found that editing alsa-base file from root i.e etc/modprobe.d/alsa-base and adding model ="Lenovo" would correct the sound problem. but when i typed sudo, it doesnt ask me for password nor i am able to edit it with a command sudo gedit etc/modprobe.d/alsa-base.
Please help me
Thanks in advance