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Old 10-07-2012, 12:12 PM   #1
Rotten194
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Running 3 monitors off an Intel HD 3000 - possible?


Im trying to set up my laptop so when it's at home, I can use three monitors. I already have it working perfectly with an external HDMI screen. I now want to use the VGA port to add another. Here's the output of xrandr -1 --verbose: (unused modes removed because they're insanely long)

Code:
jon@ubuntu: xrandr -q --verbose                                             (0)
Screen 0: minimum 320 x 200, current 3046 x 1050, maximum 8192 x 8192
LVDS1 connected 1366x768+0+282 (0x45) normal (normal left inverted right x axis y axis) 344mm x 193mm
	Identifier: 0x41
	Timestamp:  911960
	Subpixel:   horizontal rgb
	Gamma:      1.0:1.0:1.0
	Brightness: 1.0
	Clones:    
	CRTC:       0
	CRTCs:      0 1
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	EDID:
		00ffffffffffff004ca3415500000000
		00130103802213780ace859e5b4c9426
		17505400000001010101010101010101
		010101010101411c56a0500016303020
		250058c1100000190000000f00000000
		00000000001eb4027400000000fe0053
		414d53554e470a2020202020000000fe
		00313536415430352d5430320a2000b8
	BACKLIGHT: 3 (0x00000003)	range:  (0,7)
	Backlight: 3 (0x00000003)	range:  (0,7)
	scaling mode:	Full aspect
		supported: None         Full         Center       Full aspect 
  1366x768 (0x45)   72.3MHz -HSync -VSync *current +preferred
        h: width  1366 start 1414 end 1446 total 1526 skew    0 clock   47.4KHz
        v: height  768 start  770 end  775 total  790           clock   60.0Hz
VGA1 connected (normal left inverted right x axis y axis)
	Identifier: 0x42
	Timestamp:  911960
	Subpixel:   unknown
	Clones:    
	CRTCs:      0 1
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	EDID:
		00ffffffffffff0010ac103043323741
		0e0e01030e221b78eeee9da3544c9926
		0f4f54a54b008180714f010101010101
		010101010101302a009851002a403070
		1300520e1100001e000000ff00325933
		3131343354413732430a000000fc0044
		454c4c203137303346500a20000000fd
		00384c1e500e000a2020202020200001
  1280x1024 (0x4e)  108.0MHz +HSync +VSync +preferred
        h: width  1280 start 1328 end 1440 total 1688 skew    0 clock   64.0KHz
        v: height 1024 start 1025 end 1028 total 1066           clock   60.0Hz
HDMI1 connected 1680x1050+1366+0 (0x4c) normal (normal left inverted right x axis y axis) 474mm x 296mm
	Identifier: 0x43
	Timestamp:  911960
	Subpixel:   unknown
	Gamma:      1.0:1.0:1.0
	Brightness: 1.0
	Clones:    
	CRTC:       1
	CRTCs:      0 1
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	EDID:
		00ffffffffffff004c2d7c0332325141
		0b120103802f1e782a78f1a655489b26
		125054bfef80b30081808140714f0101
		0101010101017c2e90a0601a1e403020
		3600da281100001a000000fd00384b1e
		510e000a202020202020000000fc0053
		796e634d61737465720a2020000000ff
		0048394e513330393937380a202000d2
	Broadcast RGB:	Full
		supported: Full         Limited 16:2
	audio:	auto
		supported: off          auto         on          
  1680x1050 (0x4c)  119.0MHz +HSync -VSync *current +preferred
        h: width  1680 start 1728 end 1760 total 1840 skew    0 clock   64.7KHz
        v: height 1050 start 1053 end 1059 total 1080           clock   59.9Hz
DP1 disconnected (normal left inverted right x axis y axis)
	Identifier: 0x44
	Timestamp:  911960
	Subpixel:   unknown
	Clones:    
	CRTCs:      0 1
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	Broadcast RGB:	Full
		supported: Full         Limited 16:2
	audio:	auto
		supported: off          auto         on
This shows VGA1 connected, but not having a CRTC assigned. When I try to adjust the monitor positions with ARandR, I get this:

http://i.imgur.com/X4hDV.png

The size doesn't expand to allow the VGA monitor to fit in. Also, trying to apply it anyways I get an error:
Code:
XRandR failed:
XRandR returned error code 1: xrandr: cannot find crtc for output LVDS1
(sometimes instead of LVDS1 it's VGA1).

LVDS1 is my primary laptop monitor, HDMI1 is the working external display, and VGA1 is the new display I'm trying to hook up.

Any ideas? I'm just kind of throwing stuff at the wall to see what sticks, so some help would really, well, help.
 
Old 10-08-2012, 12:55 AM   #2
cascade9
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Intel HD 3000 offically supports only 2 monitors. Only the newest HD 2500/4000 suport 3 monitors (and its a 'manufactuer option' so not all HD2500/4000 systems will be able to use 3 monitors)

Quote:
Starting with the 3rd Generation Intel® Core™ Processors with Intel® HD Graphics 4000/2500, three displays support may be possible depending on your computer's configuration. Check with your computer manufacturer if three displays are supported on your computer and which display combinations are supported.
http://www.intel.com/support/graphic...S-031040.htm#3

You might be able to get the 3rd monitor going with a USB->VGA adapter, I'm not sure about that as I never use USB->VGA adapters.
 
Old 10-19-2012, 07:10 PM   #3
Rotten194
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Registered: Dec 2011
Posts: 15

Original Poster
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Quote:
Originally Posted by cascade9 View Post
Intel HD 3000 offically supports only 2 monitors. Only the newest HD 2500/4000 suport 3 monitors (and its a 'manufactuer option' so not all HD2500/4000 systems will be able to use 3 monitors)



http://www.intel.com/support/graphic...S-031040.htm#3

You might be able to get the 3rd monitor going with a USB->VGA adapter, I'm not sure about that as I never use USB->VGA adapters.
Thanks for the pointer about USB->VGA. I ordered one and it got here a few days ago. I've been fiddling trying to get it to work to no avail. I'll think I'll post a new thread, though.
 
  


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