do you mean audio work with the emulated hda sound card before you upgrade ? or just other emulated sound card work before upgrade since the emulated hda sound card is quite new compared with emulated AC97 sound card ?
Since upgrading to Ubuntu 13.10 audio no longer works in KVM. Checking SYSLOG I found this error being logged: Oct 31 15:32:31 bmullan-virtual-machine pulseaudio[1814]: [alsa-source-ID 21 Analog] alsa-source.c: ALSA woke us up to read new data from the device, but there was actually nothing to read! Oct 31 15:32:31 bmullan-virtual-machine pulseaudio[1814]: [alsa-source-ID 21 Analog] alsa-source.c: Most likely this is a bug in the ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA developers. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1246929 Title: alsa bug in KVM virtual machines To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1246929/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
