https://bugs.freedesktop.org/show_bug.cgi?id=87457
--- Comment #4 from John Brooks john@fastquake.com --- Forgot to mention my setup. I'm using an ASUS R9 290, a Linux Mint base system tracking the xorg-edgers PPA, and kernel 3.19-rc3 from here: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19-rc3-vivid/
I have the latest linux-firmware.
The mclk began changing after I upgraded from 3.18.1, but the sclk is still stuck at the lowest level.