this is still an issue in current dapper; it just bit me after a routine kernel update/reboot.
The error I got was: : jm 73...; sudo /etc/init.d/alsa-utils start Password: * Setting up ALSA... * warning: 'alsactl restore' failed with error message 'alsactl: set_control:894: warning: name mismatch (External Amplifier/Headphone Jack Sense) for control #26 alsactl: set_control:896: warning: index mismatch (0/0) for control #26 alsactl: set_control:898: failed to obtain info for control #26 (Operation not permitted)'... ...done. It was quite tricky to fix, unfortunately, since on my hardware (Thinkpad T40) enabling "Line Jack Sense" inhibits all audio output as a side-effect; attempting to manually recreate a working alsamixer setup led me to switch that on (out of ignorance of the side-effects). An automatic, script-based recreation of a "sane" mixer setup would have avoided that mis-step. -- alsa-utils cannot always restore mixer settings correctly across upgrades https://launchpad.net/bugs/21804 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
