I experience this issue since kernel version 3.19.0-18-generic with previous kernel versions sound output via HDMI/DP worked like a charm. Please take a look at the attached dmesg output maybe they are the cause or related to.
** Attachment added: "dmesg output" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1453447/+attachment/4401911/+files/dmesg.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1453447 Title: [Vivid] kernel 3.19.0-17 fails to show HDMI sound output To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1453447/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
