Happens to me after last update. ALSA 1.0.24 on Ubuntu 11.10. Before updating it was all fine (when the earphones are plugged the speakers get mute). After last system update, when I plug the earphones everything is mute, both speakers and earphones.
The first workaround I read (commenting code = Headphone) worked only the first time. After rebooting, it does not work anymore (I tried rebooting pulseaudio, disabling respawn, toggling the comment, etc.). Happens also when pulseaudio is off. This is very annoying to me as I can't use VOIP (unless I use it with speakers, which of course produces echo in mic). My laptop is a vaio VPCS11E7E lspci: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05) Codec: Realtek ALC275 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/921397 Title: Speaker audio channel goes mute after plugging in the headphone To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/921397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs