I can indeed confirm that upgrading to AMD Catalyst 12.6 Beta fixed the problem.
I build the .deb package from the install file using the internal build process: sh ./amd-driver-installer-8.98-x86.x86_64.run --buildpkg Ubuntu/precise sudo dpkg --install fglrx_8.980-0ubuntu1_amd64.deb sudo dpkg --install fglrx-amdcccle_8.980-0ubuntu1_amd64.deb After restart, the problem no longer occurs. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1001842 Title: No Audio from HDMI After Switching Monitor Off / On To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/1001842/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs