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Old 11-01-2007, 09:41 PM   #1
tenmiles
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dual video cards


I'm trying to run dual monitors on my machine and it seems like the cheapest way to go would be to go with dual PCI video cards (they're Nvidia 5200s) instead of a single video card (by about $20), but I was wondering how hard it would be to set that up. I noticed someone else was having some issues with it, but he had different monitors/video cards and stuff, both video cards would be the same brand/model/etc and the monitors are identical as well. Would it be worth it to save the $20 (the alternative is ATI and I've heard there's issues with ATI drivers on linux so that's a factor as well)
 
Old 11-02-2007, 05:42 AM   #2
bandad
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I would have no concerns about two cards, and would probably favour them. I have a single ATI dual head card and am currently having real problems getting it working under Ubuntu Gutsy.

Which distribution are you using? I have used Slackware for years but have recently converted workstations to Ubuntu and am generally VERY impressed. The current xrandr based setup nearly gives the graphical setup tools that a modern desktop os ought to have. In my case I have reverted to the "hack the xorg.conf" mode - which I feel more comfortable with.

The ATI problem I have is that the DVI head (with a converter to VGA) is not being detected properly. The card/driver can't find the monitor. But my card is a fairly old 9200. Perhaps a modern one would not have these issues?

I have not been able to override this behaviour yet. So I am stuck with a single monitor - all be it with amazing rotating cubes and all action dancing windows thanks to compiz. The 1-to-1 monitor-to-card option would not have this issue.

Meanwhile... can anyone help me too?

xrandr reports as follows:
Code:
xrandr -q
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 2560 x 1024
VGA-0 connected 1280x1024+0+0 (normal left inverted right) 0mm x 0mm
   1600x1024      60.0  
   1280x1024      60.0* 
   1440x900       60.2  
   1280x960       60.0  
   1280x800       60.0  
   1152x864       75.0  
   1280x768       60.0  
   1024x768       70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        72.8     75.0     59.9  
DVI-0 disconnected (normal left inverted right)
S-video disconnected (normal left inverted right)
and similarly for the Xorg.0.log

Code:
(II) RADEON(0): DDC Type: 3, Detected Monitor Type: 0
(II) RADEON(0): Found color CRT connected to primary DAC
finished output detect: 0
...
(II) RADEON(0): DDC Type: 2, Detected Monitor Type: 0
(II) RADEON(0): Detected Monitor Type: 0
finished output detect: 1
finished output detect: 2
finished all detect
...
(II) RADEON(0): DDC Type: 2, Detected Monitor Type: 0
(II) RADEON(0): Detected Monitor Type: 0
(II) RADEON(0): Output DVI-0 disconnected
(II) RADEON(0): EDID for output DVI-0
(II) RADEON(0): Output S-video disconnected
(II) RADEON(0): EDID for output S-video
(II) RADEON(0): Output VGA-0 connected
(II) RADEON(0): Output DVI-0 disconnected
(II) RADEON(0): Output S-video disconnected
(II) RADEON(0): Output VGA-0 using initial mode 1280x768
relevant section of xorg.conf:

Code:
Section "Device"
        Identifier      "Radeon9200"
        Driver          "radeon"
        BusID           "PCI:1:0:0"
        Option          "monitor-DVI-0" "IIyama-1"
        Option          "monitor-VGA-0" "IIyama-0"
        Option          "MonitorLayout" "CRT, CRT"
EndSection

Section "Monitor"
        Identifier      "IIyama-0"
        Option          "DPMS"
        HorizSync       24-80
        VertRefresh     56-75
        Option          "Position"      "1280 0"
EndSection

Section "Monitor"
        Identifier      "IIyama-1"
        Option          "DPMS"
        HorizSync       24-80
        VertRefresh     56-75
        Option          "LeftOf"        "IIyama-0"
EndSection


Section "Screen"
        Identifier      "Default Screen"
        Device          "Radeon9200"
        Monitor         "IIyama-0"
        DefaultDepth    24
        SubSection "Display"
                Depth           24
                Virtual         2560 1024
                Modes           "1280x1024" 
        EndSubSection
EndSection


Section "ServerLayout"
        Identifier      "Default Layout"
        Screen          "Default Screen"
        InputDevice     "Generic Keyboard"
        InputDevice     "Configured Mouse"
        Option          "AIGLX" "true"
EndSection
what else should I try?
 
Old 11-02-2007, 02:15 PM   #3
tenmiles
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I'm using Fedora Core 6 currently.
 
Old 11-02-2007, 02:28 PM   #4
bandad
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Location: Surrey, UK
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I have no experience with FC6 but I would buy two cards personally. You have redundancy built in. Just make sure the card have current driver support.
 
  


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