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Re: which videcard for dual-monitor setup?
Date: Mon Aug 27 2007 - 13:14:10 EDT
On August 27, 2007 07:38:24 am Tinus Nijmeijers wrote:
> On Mon, 2007-08-27 at 12:20 +0200, Pol Hallen wrote:
> > > which videocard is recommended if I want a system with 2 screens
> > > attached?
> >
> > I always used nvidia video card (with vga+dvi)
> >
> > > or even 4 screens if that's at all possible.
> >
> > yep! it's possible :-)
> >
> > with 2 graphics card (vga+dvi)
> >
> > Regards
> >
> > Pol
>
> I always thought the dvi and analog output were the same signal; how do
> you get X to show something different on both screens?
I see you have already found a how-to for Xinerama but if you want separate X screens instead of the one big screen across the monitors then you can do similar to my Device sections below.
Section "Device"
Identifier "Card0"
Driver "nvidia"
Option "NoLogo" "on"
Option "NvAgp" "3"
Option "RenderAccel" "true"
Option "BackingStore" "On"
Option "Coolbits" "1"
Option "IgnoreDisplayDevices" "TV"
Screen 0
VendorName "EVGA"
BoardName "e-Geforce 7900 GS KO"
BusID "PCI:1:0:0"
EndSection
Section "Device"
Identifier "Card1"
Driver "nvidia"
Option "NoLogo" "on"
Option "NvAgp" "3"
Option "RenderAccel" "true"
Option "BackingStore" "On"
Option "DPI" "100x100"
Option "Coolbits" "1"
Screen 1
Option "IgnoreDisplayDevices" "TV"
VendorName "EVGA"
BoardName "e-Geforce 7900 GS KO"
BusID "PCI:1:0:0"
EndSection
Then for your ServerLayout.
Section "ServerLayout"
Identifier "DualHead"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" LeftOf "Screen0"
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
And you need to put Load "xtrap" in your Module section to have the mouse move between the screens. You would want to change the LeftOf to RightOf depending on the location of the second monitor. If you want to try this with a flat panel and a crt wanting the flat panel as the primary display then you need something like this for the monitor sections to make the flat panel the primary as the nvidia driver detects/uses a crt as the primary unless you use these options.
# Dell 2007WFP
Section "Monitor"
DisplaySize 431 272 # mm
Identifier "Monitor0"
VendorName "Dell"
ModelName "2007WFP"
HorizSync 30-81
VertRefresh 56-76
Option "UseDisplayDevice" "DFP-0" <------
Option "AllowDDCCI" "on"
Option "DPMS" "true"
Option "BackingStore" "On"
EndSection
# Philips 201B4
Section "Monitor"
DisplaySize 406 305 # mm
Identifier "Monitor1"
VendorName "Philips"
ModelName "201B4"
HorizSync 30-115 # DDC-probed
VertRefresh 50-160 # DDC-probed
Option "UseDisplayDevice" "CRT-1" <--------
Option "DPMS" "true"
Option "BackingStore" "On"
EndSection
You find the DFP-0 and CRT-1 names by looking in the /var/log/Xorg.0.log for the part of it where the monitors are detected. Then of course you would need a second Screen section like below.
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1680x1050"
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Card1"
Monitor "Monitor1"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1600x1200"
EndSubSection
EndSection
The rest of the config sections of the xorg.conf should be usable as is to be reused in a new xorg.conf for dual head.
> gr.
> tinus
Stephen
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