Bug 102956

Please attach your xorg log, dmesg output, and `xrandr --verbose` output.  I'm not familiar with the game off hand, but it sounds like the game may not be randr 1.2+ aware.

Using AMD Radeon R9 200 Series (AMD TONGA / DRM 3.20.0 / 4.12.0-1-amd-staging, LLVM 5.0.0), xorg 1.19.5

Sagara Family loses signal from Asus VE247 (2nd monitor DVI-D-1) on starting game in fullscreen. Relevant logs right after that happens:

dmesg

[  570.513949] [drm] Atomic commit: SET crtc id 0: [ffff8ef10757f000]
[  570.513953] [drm] dc_commit_state: 2 streams
[  570.513955] [drm] core_stream 0x8185400: src: 0, 0, 1920, 1080; dst: 0, 0, 1920, 1080, colorSpace:1
[  570.513957] [drm] 	pix_clk_khz: 148500, h_total: 2200, v_total: 1125, pixelencoder:1, displaycolorDepth:2
[  570.513958] [drm] 	sink name: VE247, serial: 16843009
[  570.513958] [drm] 	link: 3
[  570.513959] [drm] core_stream 0xba428c00: src: 0, 0, 1920, 1080; dst: 0, 0, 1920, 1080, colorSpace:1
[  570.513960] [drm] 	pix_clk_khz: 148500, h_total: 2200, v_total: 1125, pixelencoder:1, displaycolorDepth:2
[  570.513961] [drm] 	sink name: DELL U2414H, serial: 861489740
[  570.513961] [drm] 	link: 2
[  570.558553] [drm] dce_get_required_clocks_state: clocks unsupported
[  570.582990] [drm] GSL: Setting-up...
[  570.582998] [drm] GSL: enabling trigger-reset
[  570.583003] [drm] GSL: waiting for reset to occur.
[  570.584750] [drm] GSL: reset occurred at wait count: 1
[  570.584750] [drm] GSL: disabling trigger-reset.
[  570.584753] [drm] GSL: Restoring register states.
[  570.584758] [drm] GSL: Set-up complete.
[  570.584783] [drm] [Mode]	[DDVI][ConnIdx:3] {1920x1080, 2200x1125@148500Khz}^
[  570.584808] [drm] [Mode]	[DDVI][ConnIdx:2] {1920x1080, 2200x1125@148500Khz}^


xrandr --current 

Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
HDMI-A-0 disconnected (normal left inverted right x axis y axis)
DVI-D-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 527mm x 296mm
   1920x1080     60.00*+  50.00    59.94  
   1600x1200     60.00  
   1680x1050     60.00  
   1600x900      60.00  
   1280x1024     75.02    60.02  
   1440x900      60.00  
   1280x800      60.00  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    60.00    59.94  
   720x400       70.08  
DVI-D-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 531mm x 299mm
   1920x1080     60.00*+
   1600x1200     60.00  
   1680x1050     59.88  
   1280x1024     75.02    60.02  
   1440x900      59.90  
   1280x960      60.00  
   1280x800      60.00  
   1152x864      75.00  
   1280x720      60.00  
   1024x768      75.03    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   640x480       75.00    72.81    66.67    59.94  
   720x400       70.08

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