I tried many combinations with xrandr command under lubuntu 12.04 to setup my three monitors
DVI (DELL 1) left detected as HDMI1
HDMI (LG E2290) middle detected as HDMI2
VGA (DELL 2) right detected as VGA1
I can get the display with fix 1280x1024 on all the monitors. But once I setup 1280x1024 + 1920x1080 + 1280x1024, I get blank screen on all the monitors. Sometimes it throws crts fail error instead of blanking out.
Anyone have similar issues? any solutions/workarounds?
P.S. I can setup two monitors using 1280x1280 and 1920x1080
P.S.S. HDMI2 required at least 1920x1080 to display sharp picture.
Outputs (it seems graphic card supports up to 8192x8192):
xrandr
Screen 0: minimum 320 x 200, current 3840 x 1024, maximum 8192 x 8192
VGA1 connected 1280x1024+2560+0 (normal left inverted right x axis y axis) 338mm x 270mm
1280x1024 60.0*+ 75.0
1152x864 75.0
1024x768 75.1 60.0
800x600 75.0 60.3
640x480 75.0 60.0
720x400 70.1
HDMI1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 301mm
1280x1024 60.0*+ 75.0
1152x864 75.0
1024x768 75.1 60.0
800x600 75.0 60.3
640x480 75.0 60.0
720x400 70.1
HDMI2 connected 1280x1024+1280+0 (normal left inverted right x axis y axis) 477mm x 268mm
1920x1080 60.0 +
1680x1050 60.0
1280x1024 75.0 60.0*
1152x864 75.0
1024x768 75.1 60.0
800x600 75.0 60.3
640x480 75.0 60.0
720x400 70.1
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
3 CRTs (0,1 VGA, 0,1,2 for other HDMI)
xrandr --verbose
VGA1 connected 1280x1024+2560+0 (0x47) normal (normal left inverted right x axis y axis) 338mm x 270mm
Identifier: 0x42
Timestamp: 51324
Subpixel: unknown
Gamma: 1.0:1.0:1.0
Brightness: 1.0
Clones:
CRTC: 0
CRTCs: 0 1
...
HDMI1 connected 1280x1024+0+0 (0x47) normal (normal left inverted right x axis y axis) 376mm x 301mm
Identifier: 0x43
Timestamp: 51324
Subpixel: unknown
Gamma: 1.0:1.0:1.0
Brightness: 1.0
Clones:
CRTC: 1
CRTCs: 0 1 2
...
HDMI2 connected 1280x1024+1280+0 (0x47) normal (normal left inverted right x axis y axis) 477mm x 268mm
Identifier: 0x44
Timestamp: 51324
Subpixel: unknown
Gamma: 1.0:1.0:1.0
Brightness: 1.0
Clones:
CRTC: 2
CRTCs: 0 1 2
Below command fails:
xrandr --output VGA1 --auto --output HDMI2 --auto --left-of VGA1 --output HDMI1 --auto --left-of HDMI2
Below command passes:
xrandr --output VGA1 --auto --output HDMI2 --mode 1280x1024 --rate 60.0 --left-of VGA1 --output HDMI1 --auto --left-of HDMI2
Graphic card VGA compatible controller: Intel Corporation Ivy Bridge Graphics Controller (rev 09)