drivers - Dual monitors only work in Ubuntu 16.04.1 Gnome when set to different resolutions (AMD R9 380) - Ask Ubuntu

i have dvi + hdmi dual monitor setup amd radeon r9 380. can't use both monitors @ max resolution though. 1 monitor can @ max resolution , other must different. if set them same resolution, 1 of screens blank still seems receiving signal because doesn't turn off.

here output lshw -c video

crawforc3@ubuntu:~$ sudo lshw -c video   *-display                       description: vga compatible controller        product: tonga pro [radeon r9 285/380]        vendor: advanced micro devices, inc. [amd/ati]        physical id: 0        bus info: pci@0000:01:00.0        version: f1        width: 64 bits        clock: 33mhz        capabilities: pm pciexpress msi vga_controller bus_master cap_list rom        configuration: driver=amdgpu latency=0        resources: irq:128 memory:e0000000-efffffff memory:f0000000-f01fffff ioport:e000(size=256) memory:f7e00000-f7e3ffff memory:f7e40000-f7e5ffff 

output xrandr

crawforc3@ubuntu:~$ xrandr screen 0: minimum 320 x 200, current 3600 x 1080, maximum 16384 x 16384 displayport-0 disconnected (normal left inverted right x axis y axis) hdmi-a-0 connected 1680x1050+1920+30 (normal left inverted right x axis y axis) 527mm x 296mm    1920x1080     60.00 +  50.00    59.94    30.00    29.97      1920x1080i    60.00    50.00    59.94      1680x1050     59.88*     1280x1024     75.02    60.02      1440x900      59.90      1280x960      60.00      1280x800      59.91      1152x864      75.00      1280x720      60.00    50.00    59.94      1440x576      50.00      1024x768      75.08    70.07    60.00      1440x480      60.00    59.94      832x624       74.55      800x600       72.19    75.00    60.32    56.25      720x576       50.00      720x480       60.00    59.94      640x480       75.00    66.67    60.00    59.94      720x400       70.08   dvi-d-0 disconnected (normal left inverted right x axis y axis) dvi-i-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 527mm x 296mm    1920x1080     60.00 +  50.00    59.94*   30.00    29.97      1920x1080i    60.00    50.00    59.94      1680x1050     59.88      1280x1024     75.02    60.02      1440x900      59.90      1280x960      60.00      1280x800      59.91      1152x864      75.00      1280x720      60.00    50.00    59.94      1440x576      50.00      1024x768      75.08    70.07    60.00      1440x480      60.00    59.94      832x624       74.55      800x600       72.19    75.00    60.32    56.25      720x576       50.00      720x480       60.00    59.94      640x480       75.00    66.67    60.00    59.94      720x400       70.08   

and contents of ~/.config/monitors.xml

<monitors version="1">   <configuration>     <clone>no</clone>     <output name="dvi-i-1">       <vendor>aci</vendor>       <product>asus vn248</product>       <serial>eclmtf168617</serial>       <width>1920</width>       <height>1080</height>       <rate>59.940200805664062</rate>       <x>0</x>       <y>0</y>       <rotation>normal</rotation>       <reflect_x>no</reflect_x>       <reflect_y>no</reflect_y>       <primary>yes</primary>       <presentation>no</presentation>       <underscanning>no</underscanning>     </output>     <output name="hdmi-a-0">       <vendor>aci</vendor>       <product>asus vn248</product>       <serial>eclmtf168622</serial>       <width>1680</width>       <height>1050</height>       <rate>59.883251190185547</rate>       <x>1920</x>       <y>30</y>       <rotation>normal</rotation>       <reflect_x>no</reflect_x>       <reflect_y>no</reflect_y>       <primary>no</primary>       <presentation>no</presentation>       <underscanning>no</underscanning>     </output>   </configuration> </monitors> 

amd not working ubuntu 16.x. best bet today unfortunately downgrade 14.04 lts (still quite few years of support go) until computer dies , buy 1 better hardware acceleration support ubuntu.