triple monitors and xinerama = black screen when game starts?

after a fresh clean install of ubuntu (my old install got borked somehow) i cannot for the life of me get my games from steam to play when Xinerama is enabled, it worked with my last ubuntu install with absolutely no issues, now all that happens is every time i start a game all three screens go black and nothing shows except the cursor no sound no visuals nothing , here are my specs:

  • Ubuntu 15.04
  • Nvidia 970 using the 352.21 driver
  • Intel i7 4790k

and here is my config

nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 346.59 (buildd@toyol) Thu Apr 9 09:44:23 UTC 2015
Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" 0 0 InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" Option "Xinerama" "1"
EndSection
Section "Files"
EndSection
Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd"
EndSection
Section "Monitor" # HorizSync source: edid, VertRefresh source: edid Identifier "Monitor0" VendorName "Unknown" ModelName "BenQ RL2455" HorizSync 30.0 - 83.0 VertRefresh 50.0 - 76.0 Option "DPMS"
EndSection
Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GTX 970"
EndSection
Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "Stereo" "0" Option "nvidiaXineramaInfoOrder" "DFP-1" Option "metamodes" "DVI-I-0: nvidia-auto-select +3840+0, HDMI-0: nvidia-auto-select +1920+0, DVI-D-0: nvidia-auto-select +0+0" Option "SLI" "Off" Option "MultiGPU" "Off" Option "BaseMosaic" "off" SubSection "Display" Depth 24 EndSubSection
EndSection

1 Answer

You'll have to enable Basemosaic in the Nvidia driver to get all monitors working together, when Xinerama is enabled.

1

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