dualhead breaks after monitor removed then replaced

todfox · 11-09-2005, 07:29 PM

I am helping a friend set up his dual head ATI Radeon graphics card using Mandrake 10.1. He had a friend setup dual head for him and it worked for a while, but then he unplugged the monitor and put it on another computer. Now that he has brought back the other monitor and plugged it into the original computer, instead of a dualhead display they show clones of each other. His config files (xorg.conf,etc) appear to have a correct setup for dual-head support with one monitor LeftOf the other. What could have happened here?

Kit

todfox · 11-09-2005, 08:52 PM

Here are applicable parts of his XFree86Config file which should by all accounts and How-tos work:

Code:

Section "ServerFlags"
    Option "Xinerama" "on"
EndSection

Section "Module"
    Load "dbe" # Double-Buffering Extension
    Load "v4l" # Video for Linux
    Load "extmod"
    Load "type1"
    Load "freetype"
    Load "dri" # direct rendering
    Load "/usr/X11R6/lib/modules/extensions/libglx.a"
EndSection

Section "Device"
    Identifier "device0"
    VendorName "ATI"
    BoardName "ATI Radeon"
    Driver "radeon"
    BusID "1:0:0"
    Option "DCCMode" "on"
    Option "DPMS"
    Screen 0
EndSection

Section "Device"
    Identifier "device1"
    BoardName "ATI Radeon"
    BusID "1:0:0"
    Driver "radeon"
    Option "DCCMode" "on"
    Option "DPMS"
    Screen 1
EndSection

Section "Screen"
    Identifier "screen0"
    Device "device0"
    Monitor "monitor0"
    DefaultColorDepth 16
    Screen 0

    Subsection "Display"
        Depth 8
        Virtual 1024 768
    EndSubsection

    Subsection "Display"
        Depth 15
        Virtual 1024 768
    EndSubsection

    Subsection "Display"
        Depth 16
        Virtual 1024 768
    EndSubsection

    Subsection "Display"
        Depth 24
        Virtual 1024 768
    EndSubsection
EndSection

Section "Screen"
    Identifier "screen1"
    Device "device1"
    Monitor "monitor1"
    DefaultColorDepth 16
    Screen 1

    Subsection "Display"
        Depth 8
        Virtual 1024 768
    EndSubsection

    Subsection "Display"
        Depth 15
        Virtual 1024 768
    EndSubsection

    Subsection "Display"
        Depth 16
        Virtual 1024 768
    EndSubsection

    Subsection "Display"
        Depth 24
        Virtual 1024 768
    EndSubsection
EndSection

Section "ServerLayout"
    Identifier "layout1"
    InputDevice "Keyboard1" "CoreKeyboard"
    InputDevice "Mouse1" "CorePointer"
    Option "Clone" "off"
    Screen 0 "screen0" 0 0
    Screen 1 "screen1" LeftOf "screen0"
EndSection