I have a Dell e520 with Ubuntu 9.10. I had the sound fading issue through headphones, but I did the following that was mentioned in the original post and it seems to have fixed it:
Workaround : alt-f2 gksudo gedit /etc/modprobe.d/alsa-base.conf add "options snd-hda-intel model=3stack" to end of file (without quotes), save reboot -- alsa sound fades out when headphones are plugged in until you inaudible https://bugs.launchpad.net/bugs/279478 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
