This is probably a dupe of bug 445889.
Installing test package http://people.canonical.com/~diwic/temp/alsa-intel-hda-optiplex-dkms_1.0.23_all.deb solves the problem more permanently between reboots (but it apparently requires reinstalling after each kernel update).
This is probably a dupe of bug 445889.
Installing test package http:// people. canonical. com/~diwic/ temp/alsa- intel-hda- optiplex- dkms_1. 0.23_all. deb solves the problem more permanently between reboots (but it apparently requires reinstalling after each kernel update).