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Old 10-26-2011, 12:18 PM   #1
chris24300
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Question Dual monitor setup; one monitor has terrible resolution


I'm running Ubuntu 11.04 on my laptop and I run CentOS on my desktop. Using a 30" (Dell 3007WFP) and a 24" which run proper resolution on desktop.

I hooked up my monitors to my docking station the other day and now my 30" doesn't go higher than 1280x800...? I tried forcing the resolution (2560x1600) but the monitor will just shut off and is disabled when I go into nvidia-settings. I tried adding the monitor to my xorg.conf but still nothing. I have a Quadro 2000M in the laptop so this resolution shouldn't be a problem. My 24" is running at 1920x1200.

My xorg.conf with added monitor section
PHP Code:
Section "Monitor"
    
Identifier "Monitor1"
    
VendorName "DELL"
    
ModelName  "DELL 3007WFP"
    
Option       "DPMS"
    
ModeLine   "2560x1600" 268 2560 2608 2640 2720 1600 1603 1609 1646
EndSection 

Section 
"Screen"
    
Identifier     "Screen0"
    
Device         "Device0"
    
Monitor        "Monitor0"
    
DefaultDepth    24
    Option         
"TwinView" "1"
    
Option         "metamodes" "DFP-5: NULL, DFP-1: 2560x1600 +0+0, DFP-3: 1920x1200 +1920+0"
    
SubSection     "Display"
        
Depth       24
    EndSubSection
EndSection 
Here's a printout from the log I think is relevant
PHP Code:
[  3594.477] (--) NVIDIA(0): Connected display device(son Quadro 2000M at PCI:1:0:0
[  3594.477] (--) NVIDIA(0):     DELL3007WFPHC (DFP-1)
[  
3594.477] (--) NVIDIA(0):     DELL U2410 (DFP-3)
[  
3594.477] (--) NVIDIA(0):     LGD (DFP-5)
[  
3594.477] (--) NVIDIA(0): DELL3007WFPHC (DFP-1): 165.0 MHz maximum pixel clock
[  3594.477] (--) NVIDIA(0): DELL3007WFPHC (DFP-1): Internal Single Link TMDS
[  3594.477] (--) NVIDIA(0): DELL U2410 (DFP-3): 165.0 MHz maximum pixel clock
[  3594.477] (--) NVIDIA(0): DELL U2410 (DFP-3): Internal Single Link TMDS
[  3594.477] (--) NVIDIA(0): LGD (DFP-5): 480.0 MHz maximum pixel clock
[  3594.477] (--) NVIDIA(0): LGD (DFP-5): Internal DisplayPort
[  3594.479] (**) NVIDIA(0): TwinView enabled
[  3594.479] (IINVIDIA(0): Display Devices found referenced in MetaModeDFP-1DFP-3,
[  
3594.479] (IINVIDIA(0):     DFP-5
[  3594.479] (WWNVIDIA(0): There are only 2 heads availabletrimming display device list
[  
3594.479] (WWNVIDIA(0):     from "DFP-1, DFP-3, DFP-5" to "DFP-1, DFP-3".
[  
3594.515] (IINVIDIA(0): Assigned Display DevicesDFP-1DFP-3
[  3594.515] (WWNVIDIA(0): Invalid display device in Mode Description "DFP-5:NULL"
[  3594.515] (WWNVIDIA(0): Not using mode description "DFP-5:NULL"unable to map to
[  3594.515] (WWNVIDIA(0):     display device
[  3594.515] (IINVIDIA(0): Validated modes:
[  
3594.515] (IINVIDIA(0):     "DFP-5:NULL,DFP-1:2560x1600+0+0,DFP-3:1920x1200+1920+0"
[  3594.515] (IINVIDIA(0): Virtual screen size determined to be 3840 x 1200
[  3594.742] (WWNVIDIA(0): Cannot find size of first mode for DELL3007WFPHC (DFP-1);
[  
3594.742] (WWNVIDIA(0):     cannot compute DPI from DELL3007WFPHC (DFP-1)s EDID.
[  
3594.742] (==) NVIDIA(0): DPI set to (7575); computed from built-in default
[  
3594.742] (WWNVIDIA(0): UBB is incompatible with the Composite extension.  Disabling
[  3594.742] (WWNVIDIA(0):     UBB
Thanks for any help!
 
Old 10-26-2011, 02:07 PM   #2
thezerodragon
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In my experience, getting dual screens to work with an nVidia chipset involves nouveau. Do you have a driver installed for your GPU?
 
Old 10-26-2011, 02:16 PM   #3
chris24300
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Yea at first I had the bundled nVidia driver and after it wasn't displaying properly I installed the updated driver from nVidia. Well what's strange is that even with just my 30" monitor connected it will display funky..
 
Old 10-26-2011, 11:06 PM   #4
thezerodragon
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Sorry, I should have read that you were going to nVidaia-settings. Speaking of your first post, could you elaborate on
Quote:
to my docking station
?

Thanks
 
Old 10-27-2011, 04:11 AM   #5
cascade9
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I'd guess that your docking station doesnt support dual link DVI, which you need to get 2560x1600

Quote:
With a single DVI link, the highest supported standard resolution is 2.75 megapixels (including blanking interval) at 60 Hz refresh. For practical purposes, this allows a maximum screen resolution at 60 Hz of 1,915 1,436 pixels (standard 4:3 ratio), 1,854 1,483 pixels (5:4 ratio), or 2,098 1,311 (widescreen 16:10 ratio).

To support display devices requiring higher video bandwidth, there is provision for a dual DVI link.
http://en.wikipedia.org/wiki/Digital_Visual_Interface

Quote:
Originally Posted by thezerodragon View Post
In my experience, getting dual screens to work with an nVidia chipset involves nouveau.
I've had no problems running dual monitors working with the nVidia closed drivers.
 
Old 10-27-2011, 07:10 AM   #6
chris24300
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Quote:
Originally Posted by thezerodragon View Post
Sorry, I should have read that you were going to nVidaia-settings. Speaking of your first post, could you elaborate on
?

Thanks
Laptop has a board interface underneath it that sits in the docking station. Allows me to plug everything into the docking station rather than the laptop. I have keyboard mouse monitors etc plugged in and if I have to run I can just eject the laptop and go.

It has 2 DVIs out in the back, I don't see why it wouldn't support dual link. if it matters both cables are full pins and the 24" is 1920x1200.
 
Old 10-27-2011, 07:14 AM   #7
chris24300
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It would be nice to have a third monitor to test the resolution output, I'll try and borrow one if that might shed some light on my situation.
 
Old 10-27-2011, 09:50 AM   #8
chris24300
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If I just connect my 30" it still has the low resolution.
 
  


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