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Headless AMD graphics card with integrated Intel GPU on Ubuntu

Question asked by lms135 on Dec 17, 2015
Latest reply on Dec 20, 2015 by nibal



I am trying to know how to activate/access AMD GPU for OpenCL applications and CodeXL when it is not connected to any display.

In other words, I want to use AMD GPU as a dedicated compute device while integrated Intel GPU is in charge of display (and X window).

(1) I have two monitors. All of them have been connected to integrated GPU.

(2) I've installed "AMD Radeon Software Crimson Edition Proprietary Ubuntu Graphics Driver" by using dpkg -i

(3) However, after rebooting, what I can see through my monitors is just blank screen. (At least, during booting, I can see something including Ubuntu logo...)


Please let me know what I need to to fix this issue. I attach my system environment and contents of xorg.conf


My system environment includes the followings:

- Ubuntu 14.04 LTS

- Intel Core i7-4470 CPU

- AMD Radeon R9 Fury X


Contents of xorg.conf

  1 Section "ServerLayout"

  2     Identifier "amd-layout"

  3     Screen 0 "amd-screen" 0 0

  4 EndSection


  6 Section "Device"

  7     Identifier "intel"

  8     Driver "intel"

  9     Option "AccelMethod" "uxa"

10     BusID "PCI:0@0:2:0"

11 EndSection


13 Section "Device"

14     Identifier "amd-device"

15     Driver "fglrx"

16     BusID "PCI:1:0:0"

17 EndSection


19 Section "Monitor"

20     Identifier "amd-monitor"

21     Option "VendorName" "ATI Proprietary Driver"

22     Option "ModelName" "Generic Autodetecting Monitor"

23     Option "DPMS" "true"

24 EndSection


26 Section "Screen"

27     Identifier "amd-screen"

28     Device "amd-device"

29     Monitor "amd-monitor"

30     DefaultDepth 24

31     SubSection "Display"

32         Viewport   0 0

33         Depth     24

34     EndSubSection

35 EndSection