[Bug 68485] triple monitor support not working on HD 4600

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=68485

--- Comment #2 from Richard Neill <xorg at richardneill.org> ---
Thanks for your help.

Here's what happens with xrandr:
  $ xrandr --verbose --output HDMI1 --auto --output HDMI2 --auto --output HDMI3
--auto                                                                          
crtc 0:    1600x1200   60.0 +1600+0 HDMI3"                      
crtc 1:    1600x1200   60.0 +3200+42 "HDMI2"                       
crtc 2:    1600x1200   60.0 +0+0 "HDMI1"

xrandr: Configure crtc failed                                
crtc 0: disable                                                   
crtc 1: disable                                                  
crtc 2: disable                                                  
screen 0: revert                                                  
crtc 0: revert                                                   
crtc 1: revert                                                   
crtc 2: revert 

.... and this in Xorg.0.log

[102235.666] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 0 using
HDMI3, position (1600, 0), rotation normal
[102235.820] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 1 using
HDMI2, position (3200, 42), rotation normal
[103210.958] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 0 using
HDMI3, position (1600, 0), rotation normal
[103211.108] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 1 using
HDMI2, position (3200, 42), rotation normal
[103511.282] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 0 using
HDMI3, position (1600, 0), rotation normal
[103511.436] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 1 using
HDMI2, position (3200, 42), rotation normal
[108079.743] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 0 using
HDMI3, position (1600, 0), rotation normal
[108079.896] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 1 using
HDMI2, position (3200, 42), rotation normal
[108979.952] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 0 using
HDMI3, position (1600, 0), rotation normal
[108980.104] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 1 using
HDMI2, position (3200, 42), rotation normal
[109280.268] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 0 using
HDMI3, position (1600, 0), rotation normal
[109280.420] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 1 using
HDMI2, position (3200, 42), rotation normal
[116494.044] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 0 using
HDMI3, position (1600, 0), rotation normal
[116494.196] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 1 using
HDMI2, position (3200, 42), rotation normal
[116505.236] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 2 using
HDMI1, position (0, 0), rotation normal
[116505.238] (EE) intel(0): failed to set mode: Invalid argument
[116505.294] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 0 using
HDMI3, position (1600, 0), rotation normal
[116505.448] (II) intel(0): switch to mode 1600x1200 at 60.0 on pipe 1 using
HDMI2, position (3200, 42), rotation normal

I'll try the drm.debug in a moment.

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