"by way of BUM " wrote:
> For two of our SGI-installations we had bought rather expensive
> video splitters to drive the second screen. With our new 700 MHz
> system with a LINUX (Red Hat 7.1) PC and a Matrox G450
> graphical card, we learned, that this card has two graphical ports,
> thus an additional screen could, in principle, be driven without
> additional costs.
>
> The question is only how to tell the system what it should do.
> There is a configuration file XF86Config-4 and we use a pixel size of
> 1280x1024 with 8 bit color depth.
>
Matrox has a very nice tool 'mgapdesk' wich allows the the Configuration
of
the DualHead graphic cards G450 and G550. You can select between
Single Display
DualHead Multi-Display
DualHead Clone
There are some caveats wich may give problems with the 8,24 Overlay
mode:
'Load dri' and 'Option Xinerama' must be disabled and 'Option
XkbDisable'
enabled.
Here is a working /etc/X11/XF86Config-4 file configured with mgapdesk.
The only changes had been the additional line
Option "XkbDisable"
because the first login screen after the changes did not allow to type
anything,
while the mouse was working. But with 'Ctrl+Alt+F1' you may login into
a text console and have a look at '/var/log/XFree86.0.log' which shows
an error XKEYBOARD extension could not be loaded.
==================== cut here ================================
Section "ServerLayout"
Identifier "Matrox PowerDesk configured."
Screen "Display 1" 0 0
Screen "Display 2" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection
Section "Files"
RgbPath "/usr/X11R6/lib/X11/rgb"
FontPath "unix/:7100"
EndSection
Section "Module"
Load "GLcore"
Load "dbe"
Load "extmod"
Load "fbdevhw"
Load "pex5"
Load "glx"
Load "pex5"
Load "record"
Load "xie"
EndSection
Section "ServerFlags"
Option "Xinerama"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "keyboard"
Option "XkbRules" "xfree86"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
Option "XkbVariant" "nodeadkeys"
# To disable the XKEYBOARD extension, uncomment XkbDisable.
Option "XkbDisable"
EndSection
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Device" "/dev/mouse"
Option "Protocol" "IMPS/2"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "Monitor"
Identifier "Display 1"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
HorizSync 24.5 - 80.0
VertRefresh 55.0 - 86.0
ModeLine "1400x1050" 129.0 1400 1464 1656 1960 1050 1051 1054 1100
+hsync +vsync
ModeLine "1400x1050" 151.0 1400 1464 1656 1960 1050 1051 1054 1100
+hsync +vsync
ModeLine "1400x1050" 162.0 1400 1464 1656 1960 1050 1051 1054 1100
+hsync +vsync
ModeLine "1400x1050" 184.0 1400 1464 1656 1960 1050 1051 1054 1100
+hsync +vsync
EndSection
Section "Monitor"
Identifier "Display 2"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
HorizSync 24.5 - 86.0
VertRefresh 55.0 - 160.0
ModeLine "1400x1050" 129.0 1400 1464 1656 1960 1050 1051 1054 1100
+hsync +vsync
ModeLine "1400x1050" 151.0 1400 1464 1656 1960 1050 1051 1054 1100
+hsync +vsync
ModeLine "1400x1050" 162.0 1400 1464 1656 1960 1050 1051 1054 1100
+hsync +vsync
ModeLine "1400x1050" 184.0 1400 1464 1656 1960 1050 1051 1054 1100
+hsync +vsync
EndSection
Section "Device"
Identifier "MATROX CARD 1"
Driver "mga"
VendorName "Matrox"
BoardName "Millennium G450"
Option "AGPMode4x" "on"
Option "Overlay" "8,24"
BusID "PCI:1:0:0"
EndSection
Section "Device"
Identifier "MATROX CARD 2"
Driver "mga"
Option "AGPMode4x" "on"
Option "Overlay" "8,24"
BusID "PCI:1:0:0"
Screen 1
EndSection
Section "Screen"
Identifier "Display 1"
Device "MATROX CARD 1"
Monitor "Display 1"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x1024" "1024x768" "800x600"
EndSubSection
SubSection "Display"
Depth 16
Modes "1280x1024" "1024x768" "800x600"
EndSubSection
SubSection "Display"
Depth 8
Modes "1280x1024" "1024x768" "800x600"
EndSubSection
EndSection
Section "Screen"
Identifier "Display 2"
Device "MATROX CARD 2"
Monitor "Display 2"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x1024" "1024x768" "800x600"
EndSubSection
SubSection "Display"
Depth 16
Modes "1280x1024" "1024x768" "800x600"
EndSubSection
SubSection "Display"
Depth 8
Modes "1280x1024" "1024x768" "800x600"
EndSubSection
EndSection
Section "DRI"
Mode 0666
EndSection
==================== cut here ================================
Best Regards
Günter
--
Dr. Günter Schmidt | Bruker BioSpin GmbH
| NMR Software Department
E-Mail: Guenter.Schmidt@Bruker.DE | Silberstreifen
Phone: +49 721 5161-443 / Fax:-480 | D-76287 Rheinstetten
This archive was generated by hypermail 2b29 : Tue Dec 17 2002 - 01:04:24 PST