On ATI Radeon cards/chips, HDMI audio has been disabled by the upstream kernel developers as it causes blank screens on a lot of systems.
You can re-enable HDMI audio by adding "radeon.audio=1" to your GRUB boot options. In addition to this, support for Radeon HD 6000 series HDMI audio (other than the HD 6900 series) was only added in the upstream 3.5 kernel. The kernel in the upcoming Ubuntu 12.10 "Quantal Quetzal" will be based on the 3.5 kernel, or possibly the 3.6 kernel. Ubuntu 12.10 alpha 3 can be downloaded from www.ubuntu.com/testing The final version of Ubuntu 12.10 is scheduled for release on 18th October 2012. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/771430 Title: No HDMI audio since upgrading to Natty To manage notifications about this bug go to: https://bugs.launchpad.net/alsa-driver/+bug/771430/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
