setting options snd-hda-intel model=lenovo in /etc/modprobe.d/options fixed the problem on my Asus U1F. Thanks for the hint!
Ubuntu Feisty Kernel 2.6.22-7-generic from Gutsy -- Laptop speakers do not mute when using headphones https://bugs.launchpad.net/bugs/109838 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