https://bugs.freedesktop.org/show_bug.cgi?id=99353
--- Comment #14 from Bong Cosca bong.cosca@gmail.com --- I have the same setup and I'm experiencing the same symptoms. 7400K on Asus A68HM-K with VGA/DVI-D output on ArchLinux 4.14.12 Xorg 1.19.6, colored noise (sometimes tiled garbage). I tried every possible combination of kernel and R600_DEBUG flags along with xorg.conf options with same result. Both amdgpu and radeon drivers exhibit identical behavior.
Any updates on this issue?