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Brendan Conoboy 08-19-2008 09:02 PM

triple-headed X configuration in Fedora using Xorg nv driver
 
Hi folks,

I just finished setting up a functional 3-headed display using Fedora 8
and the nv driver. There seem to be a lot more questions than answers
out there on how to do this, so I thought I would share what I have.


The Monitors: 2 24" displays (left and right) with a centered 22"
display in portrait mode (Great for PDF reading and document editing).


The video cards: 1 GeForce 8400 PCI-E, 1 GeForce 8300 PCI-E, 1 GeForce4
MX 4000 PCI. Relevant portion of lspci:


01:00.0 VGA compatible controller: nVidia Corporation GeForce 8400 GS
(rev a1)
02:00.0 VGA compatible controller: nVidia Corporation GeForce 8300 GS
(rev a1)
04:03.0 VGA compatible controller: nVidia Corporation NV18 [GeForce4 MX
4000] (rev c1)


The GeForce4 is powering the rotated display. Evidently randr rotate
support via nv is only available on models before the NV80, so the PCI
card is necessary for now. Hopefully I can pick up a faster alternative
sometime soon.


Todo list:
Drop to 1 or 2 video cards with multiple outputs (Having trouble getting
the driver to handle the displays separately)
Bond some screens with either randr or xinerama so windows can move
between them.

Figure out some extra flags to boost performance.

Other notes:
The NV 8300 is in a 4x PCI-E slot, mechanically modified to allow the
16x card to fit.


Attached is the xorg.conf.

--
Brendan Conoboy / Red Hat, Inc. / blc@redhat.com
Section "ServerLayout"
Identifier "triple head configuration"
Screen 0 "ScreenNV83" 0 0
Screen 1 "ScreenNV18" rightof "ScreenNV83"
Screen 2 "ScreenNV84" rightof "ScreenNV18"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "Device"
Identifier "VideoNV84"
Driver "nv"
Busid "PCI:1:0:0"
Option "Accel" "1"
Option "ShadowFB" "1"
EndSection

Section "Device"
Identifier "VideoNV83"
Driver "nv"
Busid "PCI:2:0:0"
Option "Accel" "1"
Option "ShadowFB" "1"
EndSection

Section "Device"
Identifier "VideoNV18"
Driver "nv"
Busid "PCI:4:3:0"
Option "Accel" "1"
Option "ShadowFB" "1"
EndSection

Section "Screen"
Identifier "ScreenNV84"
Device "VideoNV84"
Monitor "MonitorRight"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1920x1200"
Virtual 1920 1200
EndSubSection
EndSection

Section "Screen"
Identifier "ScreenNV18"
Device "VideoNV18"
Monitor "MonitorCenter"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1680x1050"
Virtual 1680 1050
EndSubSection
EndSection

Section "Screen"
Identifier "ScreenNV83"
Device "VideoNV83"
Monitor "MonitorLeft"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1920x1200"
Virtual 1920 1200
EndSubSection
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "Monitor"
Identifier "MonitorLeft"
VendorName "Soyo Left"
ModelName "LCD Panel 1920x1200"
HorizSync 31.5 - 74.5
VertRefresh 56.0 - 65.0
Option "dpms"
Option "PreferredMode" "1920x1200"
EndSection

Section "Monitor"
Identifier "MonitorRight"
VendorName "Soyo Right"
ModelName "LCD Panel 1920x1200"
HorizSync 31.5 - 74.5
VertRefresh 56.0 - 65.0
Option "dpms"
Option "PreferredMode" "1920x1200"
EndSection


Section "Monitor"
Identifier "MonitorCenter"
VendorName "Dell"
Option "dpms"
Option "PreferredMode" "1680x1050"
Option "Rotate" "CCW"
EndSection
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