On Tuesday 29 January 2008, Marzan, Richard non Unisys wrote: > I tried googling around but no helpful content so far. I have a > laptop with built-in sound. It uses the HDA_intel kernel module. My > problem is that I can't silence the onboard/built-in speakers when I > plug in the headphones to the machine. Muting sound would lead to all > jacks and audio ports to be silenced -- not just the built-in > speakers, which I intend to mute solely leaving sound alive on the > headphone jacks. There are no channels readily observable to > differentiate where sound goes and to which port with alsa-mixer. The > behavior I would like to achieve is one that will allow me to mute > onboard speakers while continuing to have the headphones receive > audio signals. Has anyone ever done this? Any pointers to > documentation will be appreciated.
Is it a Dell with an ICH8 chipset? This is a well known bug and is fixed in alsa-1.0.15. I have this same problem on my Dell D830 which runs Gentoo and Ubuntu. On Ubuntu I use a backported kernel and 'options snd-hda-intel model=dell-m42' in /etc/modprobe.d/alsa-base -- Alan McKinnon alan dot mckinnon at gmail dot com -- gentoo-user@lists.gentoo.org mailing list
