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Odd problem with dual head

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  • Odd problem with dual head

    I've recently got a Radeon HD 6850, but I'm having trouble setting dual head up on it.

    I have once managed to get both monitors on and "looking correct" but neither xrandr or kde can see the second screen properly (doesn't show up as connected in xrandr).

    After playing with xorg.conf a lot, I managed to get xrandr to see both screens, and X seems to think everything is ok (according to xorg.log), except the second head (21" CRT) comes up like:



    I haven't found any reference to this problem on the net after searching for a couple hours. I'm completely stumped.

    Does anyone on the forums here have a clue what might be going wrong?

    Here's my xorg.conf as it stands now:
    Code:
    Section "ServerLayout"
    	Identifier     "aticonfig Layout"
    #	Screen       "Screen-LCD" 0 0
    #	Screen       "Screen-CRT" RightOf "Screen-LCD"
    #	Screen       "Screen-Ignore"
    EndSection
    
    Section "Module"
    EndSection
    
    Section "ServerFlags"
    	Option	    "Xinerama" "off"
    EndSection
    
    Section "Monitor"
    	Identifier   "LCD"
    	Option	    "VendorName" "ATI Proprietary Driver"
    	Option	    "ModelName" "Generic Autodetecting Monitor"
    	Option	    "DPMS" "true"
    	Option       "Position" "0 0"
    	Option       "Primary" "true"
    EndSection
    
    Section "Monitor"
    	Identifier   "CRT"
    	Option	    "VendorName" "ATI Proprietary Driver"
    	Option	    "ModelName" "Generic Autodetecting Monitor"
    	Option	    "DPMS" "true"
    	Option		 "RightOf" "LCD"
    EndSection
    
    Section "Monitor"
    	Identifier   "Ignore"
    	Option "DPMS" "false"
    #	Option "Enable" "false"
    EndSection
    
    Section "Device"
    	Identifier  "Radeon6850-CRT"
    	Driver      "fglrx"
    	BusID       "PCI:1:0:0"
    #	Screen      0
    	Option      "Monitor-DFP4" "LCD"
    	Option      "Monitor-CRT1" "CRT"
    	Option      "Monitor-DFP1" "Ignore"
    EndSection
    
    Section "Device"
    	Identifier  "Radeon6850-LCD"
    	Driver      "fglrx"
    	BusID       "PCI:1:0:0"
    #	Screen      1
    
    	Option      "Monitor-DFP4" "LCD"
    	Option      "Monitor-CRT1" "CRT"
    	Option      "Monitor-DFP1" "Ignore"
    EndSection
    
    Section "Device"
    	Identifier  "Radeon6850-Ignore"
    	Driver      "fglrx"
    	BusID       "PCI:1:0:0"
    #	Screen      1
    
    	Option      "Monitor-DFP4" "LCD"
    	Option      "Monitor-CRT1" "CRT"
    	Option      "Monitor-DFP1" "Ignore"
    EndSection
    
    Section "Screen"
    	Identifier "Screen-LCD"
    	Device     "Radeon6850-LCD"
    	Monitor    "LCD"
    	DefaultDepth     24
    	SubSection "Display"
    		Viewport   0 0
    		Depth     24
    #		Virtual   3520 1200
    		Modes "1920x1080"
    	EndSubSection
    EndSection
    
    Section "Screen"
    	Identifier "Screen-CRT"
    	Device     "Radeon6850-CRT"
    	Monitor    "CRT"
    	DefaultDepth     24
    	SubSection "Display"
    		Viewport   0 0
    		Depth     24
    #		Virtual   3520 1200
    		Modes "1600x1200"
    	EndSubSection
    EndSection
    
    Section "Screen"
    	Identifier "Screen-Ignore"
    	Device     "Radeon6850-Ignore"
    	Monitor    "Ignore"
    	DefaultDepth 24
    	SubSection "Display"
    		Viewport   0 0
    		Depth     24
    #		Virtual   3520 1200
    		Modes "1600x1200"
    	EndSubSection
    EndSection
    DFP4 is connected to a 24" 1920x1080 LCD, and CRT1 is connected to a 21" CRT (1600x1200). DFP1 I assume is the same port as CRT1, and it seems to want to auto detect and confuse X org, so that's why I've referenced it in the config. I've also had the Monitor section for it set the "Ignore" and "Enable"="false" options, neither of which help, and the Ignore option seems to completely disable that DVI port, including the analog vga portion.
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