radeon/matrox dual head, xinerama style

musasabi · 10-22-2005, 04:32 PM

ok, so we all know ati drivers are worthless... even their latest release claims to have xinerama support, but exhibits all the old problems still. my long term solution is that im gonna get a geforce 6600 gt and put my radeon 9800 in my windows-based secondary (which is for lan gaming).

but till ive got $200 to play with, im trying to figure out a way to use xinerama, my 9800 (using the kernel drivers), and a matrox milennium to pull off a dual head setup.

heres what ive got for the relevant parts of xorg.conf

Code:

Section "Device"
    Identifier                          "Radeon 9800"
    Driver                              "radeon"
    BusID "PCI:1:0:0"
    Screen 0
EndSection 

Section "Device"
    Identifier                          "Matrox"
    Driver                              "mga"   
    BusID "PCI:0:13:0"
    Screen 1
EndSection

...

Section "ServerLayout"
    Identifier  "Server Layout"
    Screen "Screen1"
    Screen "Screen0" RightOf "Screen1"
    InputDevice "Mouse1" "CorePointer"
    InputDevice "Keyboard1" "CoreKeyboard"
EndSection

and here are the strange bits from Xorg.0.log...

Code:

(--) PCI: (0:13:0) Matrox Graphics, Inc. MGA 2064W [Millennium] rev 1, Mem @ 0xe0000000/14, 0xe0800000/23

...

(II) MGA: driver for Matrox chipsets: mga2064w, mga1064sg, mga2164w,
        mga2164w AGP, mgag100, mgag100 PCI, mgag200, mgag200 PCI, mgag400,
        mgag550

...

(WW) MGA: No matching Device section for instance (BusID PCI:0:13:0) found

and the result is that ive got a display through my radeon, and nothing from the milennium, but the monitor connected to the milennium is getting some sort of signal, as per the power light isnt amber (for its suspended mode).

now unless im misreading the X log, it finds the matrox on pci:0.13.0 (which is what lspci reports too), loads the driver, and then fails to find a matching device section in my config file... while its plainly there.

um...? what?

CUCPSC_Geek · 10-23-2005, 12:14 PM

Where in your xorg.conf file have you added the properties for screen1? You have added the extra device, but did you add the screen 1 also into the file? If you left this out, it would load the card and all...but fail once it began looking for the section that describes what resolution and color depth to set the screen 1 to.

musasabi · 10-24-2005, 01:46 AM

this is the screen section for the matrox...

Code:

Section "Screen"
    Identifier  "Screen1"
    Device      "Matrox" 
    Monitor     "Monitor1"
    DefaultDepth 24

    Subsection "Display"
        Depth       24  
        Modes       "1280x1024" "1024x768" "800x600" "640x480"
        ViewPort    0 0  # initial origin if mode is smaller than desktop
    EndSubsection
EndSection

but the xorg log file complains about a missing device section. =\