Well. I think i solved the problem. Added the below line to the end of /etc/modprobe.d/alsa-base file. After reboot the sound seems OK.
options snd-hda-intel model=3stack ** Changed in: linux-source-2.6.20 (Ubuntu) Status: Confirmed => Fix Committed -- [Feisty] no sound with hda-intel https://bugs.launchpad.net/bugs/111486 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs