HDMI audio was 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 as described at https://help.ubuntu.com/community/Grub2/Troubleshooting#Editing_the_GRUB_2_Menu_During_Boot If that still doesn't work, or the audio channels are incorrectly mapped, a patch titled "drm/edid: add a helper function to extract the speaker allocation data block" has been published which will hopefully be included in the upstream 3.12 kernel. The patch description reads: "This adds a helper function to extract the speaker allocation data block from the EDID. This data block describes what speakers are present on the display device." -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1078451 Title: [GA-MA790GP-UD4H, ATI R6xx 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/1078451/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
