As you said, this is fixed by the BAPM (Balanced Average Power Management) support which has been added to the upstream 3.16 kernel.
For other people following this bug, a PPA of the 3.16-rc4 kernel can be found at http://kernel.ubuntu.com/~kernel-ppa/mainline/ and instructions on how to install and uninstall it are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds For now, I think that Fix Committed is appropriate, and Fix Released once Ubuntu 14.10 "Utopic Unicorn" is released in October. ** Changed in: xserver-xorg-video-ati (Ubuntu) Status: New => Fix Committed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1325165 Title: DPM support is broken in radeon APUs with HD 8000 radeon chips To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1325165/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs