Hello, so you mean that the HDMI audio output works fine before, but it does not work anymore? The kernel 3.5.0-22 you are using is pretty old, Haswell platform might not be supported yet. Have you tried to upgrade your system? (search "update manager" in Ubuntu dash)
Thanks ** Changed in: alsa-driver (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1250994 Title: [Inspiron 3537, Intel Haswell HDMI, Digital Out, HDMI] No sound at all To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1250994/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs