https://bugs.freedesktop.org/show_bug.cgi?id=91202
--- Comment #14 from Marco Wentsch marco.wentsch@gmail.com --- hi, i have the same issue on Ubuntu 16.04 LTS final. I tried to upgrade the kernel to 4.6 rc4 by self compile but nothing have changed, it doesn't work.
My graphiccard: 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Amethyst XT [Radeon R9 M295X Mac Edition / R9 380X] (rev f1)
XFX R9 380X DD Black Edition OC
On HDMI-A-0 it works on native solution on DVI-I-1 its does not work on native solutions but on 1680x1050, i have choose at the moment 1600x900 because it looks better
befor i upgrade i have ubuntu 15.10 (fgrlx and amdgpu) with the orginal kernel and self compiled 4.3 with kvm patches and with both driver it works.