@sergiodavies - You seem to have four DisplayPort monitors connected. If this is the case, you have a different bug. Nevertheless, I can advise here that support for DisplayPort audio on AMD Radeon hardware is finally available in the upstream Linux 4.0 kernel.
A PPA of the 4.0-rc2 kernel is available at http://kernel.ubuntu.com /~kernel-ppa/mainline/ and instructions on how to install and uninstall it are at https://wiki.ubuntu.com/Kernel/MainlineBuilds -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/864735 Title: [ATI HDMI] HDMI Audio Disabled by Default (since oneiric) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/864735/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs