On 31/10/06, Jenny Hopkins hopkins.jenny@gmail.com wrote:

Hullo there,

I've got a Matrox G450 dual head graphics card. I've then got two identical monitors: Flatron L1715S.

In my xorg.conf I've put the vertical and horizontal refresh rates as the same, however the second monitor stays dark. If I tweak the horiz rate for second monitor, the screen appears, but fuzzy. (I've posted what I think ought to work but is out of range below. If I change the HorizSync for Monitor[1] to 30-63 it does the fuzzy thing.)

Can anybody see any earthly reason why the same setting is not valid?

Thanks, Jenny

Section "Monitor" HorizSync 30-83 Identifier "Monitor[0]" ModelName "LG" Option "DPMS" VendorName "Flatron" VertRefresh 56-75 UseModes "Modes[0]" EndSection

Section "Monitor" HorizSync 30-83 Identifier "Monitor[1]" ModelName "LG" Option "DPMS" VendorName "Flatron" VertRefresh 56-75 UseModes "Modes[1]" EndSection

I've fiddled about in a haystack and come out with a needle. For the records, here is a conf that works beautifully: Note how I had to comment out a bunch of modes for the second monitor that are ok for the first, and narrow the horizsync. Brett on irc said something about the card not being able to drive them both at the same time, and so the clock speed varies on the two outputs. Thanks, Jenny

Section "Files" FontPath "/usr/X11R6/lib/X11/fonts/misc:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/local" FontPath "/usr/X11R6/lib/X11/fonts/75dpi:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/100dpi:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/Type1" FontPath "/usr/X11R6/lib/X11/fonts/URW" FontPath "/usr/X11R6/lib/X11/fonts/Speedo" FontPath "/usr/X11R6/lib/X11/fonts/PEX" FontPath "/usr/X11R6/lib/X11/fonts/cyrillic" FontPath "/usr/X11R6/lib/X11/fonts/latin2/misc:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/latin2/75dpi:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/latin2/100dpi:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/latin2/Type1" FontPath "/usr/X11R6/lib/X11/fonts/latin7/75dpi:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/baekmuk:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/japanese:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/kwintv" FontPath "/usr/X11R6/lib/X11/fonts/truetype" FontPath "/usr/X11R6/lib/X11/fonts/uni:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/CID" FontPath "/usr/X11R6/lib/X11/fonts/ucs/misc:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/ucs/75dpi:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/ucs/100dpi:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/hellas/misc:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/hellas/75dpi:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/hellas/100dpi:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/hellas/Type1" FontPath "/usr/X11R6/lib/X11/fonts/misc/sgi:unscaled" FontPath "/usr/X11R6/lib/X11/fonts/xtest" FontPath "/opt/kde3/share/fonts" InputDevices "/dev/gpmdata" InputDevices "/dev/input/mice" EndSection

Section "Module" Load "GLCore" Load "bitmap" Load "ddc" Load "int10" Load "record" Load "speedo" Load "vbe" Load "dbe" Load "type1" Load "freetype" Load "extmod" Load "glx" Load "v4l" Load "dri" EndSection

Section "DRI" Group "video" Mode 0660 EndSection

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

Section "InputDevice" Driver "kbd" Identifier "Keyboard[0]" Option "Protocol" "Standard" Option "XkbLayout" "gb" Option "XkbModel" "pc104" Option "XkbRules" "xfree86" EndSection

Section "InputDevice" Driver "mouse" Identifier "Mouse[1]" Option "Buttons" "5" Option "Device" "/dev/input/mice" Option "Name" "Mouse" Option "Protocol" "explorerps/2" Option "Vendor" "ms" Option "ZAxisMapping" "4 5" EndSection

Section "Device" BoardName "Matrox_0" BusID "2:0:0" Driver "mga" Identifier "Matrox[0]" Screen 0 VendorName "Matrox" Option "NoDRI" "NO" Option "HWcursor" "Off" Option "Monitor Layout" EndSection

Section "Device" BoardName "Matrox_1" BusID "2:0:0" Driver "mga" Identifier "Matrox[1]" Screen 1 VendorName "Matrox" Option "HWcursor" "Off" EndSection

Section "Monitor" HorizSync 30-83 Identifier "Monitor[0]" ModelName "LG" Option "DPMS" VendorName "Flatron" VertRefresh 56-75 UseModes "Modes[0]" EndSection

Section "Monitor" HorizSync 31.5-65 Identifier "Monitor[1]" ModelName "LG" #Option "DPMS" VendorName "Flatron" VertRefresh 56-75 UseModes "Modes[1]" EndSection

Section "Modes" Identifier "Modes[0]" Modeline "1280x1024" 165.29 1280 1376 1512 1744 1024 1025 1028 1077 Modeline "1280x960" 155.01 1280 1376 1512 1744 960 961 964 1010 Modeline "1280x960" 135.32 1280 1368 1504 1728 960 961 964 1004 Modeline "1280x960" 116.18 1280 1360 1496 1712 960 961 964 998 Modeline "1280x960" 97.68 1280 1352 1488 1696 960 961 964 993 Modeline "1280x800" 160.48 1280 1376 1512 1744 800 801 804 852 Modeline "1280x800" 144.76 1280 1376 1512 1744 800 801 804 847 Modeline "1280x800" 128.04 1280 1368 1504 1728 800 801 804 842 Modeline "1280x800" 111.77 1280 1360 1496 1712 800 801 804 837 Modeline "1280x800" 95.95 1280 1352 1488 1696 800 801 804 832 Modeline "1280x800" 80.58 1280 1344 1480 1680 800 801 804 827 Modeline "1152x864" 140.45 1152 1232 1360 1568 864 865 868 914 Modeline "1152x864" 125.43 1152 1232 1360 1568 864 865 868 909 Modeline "1152x864" 109.43 1152 1224 1352 1552 864 865 868 904 Modeline "1152x864" 93.90 1152 1224 1344 1536 864 865 868 899 Modeline "1152x864" 78.82 1152 1216 1336 1520 864 865 868 894 Modeline "1280x768" 154.07 1280 1376 1512 1744 768 769 772 818 Modeline "1280x768" 137.68 1280 1368 1504 1728 768 769 772 813 Modeline "1280x768" 122.87 1280 1368 1504 1728 768 769 772 808 Modeline "1280x768" 107.23 1280 1360 1496 1712 768 769 772 803 Modeline "1280x768" 92.15 1280 1352 1488 1696 768 769 772 799 Modeline "1280x768" 77.37 1280 1344 1480 1680 768 769 772 794 Modeline "1024x768" 122.97 1024 1096 1208 1392 768 769 772 818 Modeline "1024x768" 110.91 1024 1096 1208 1392 768 769 772 813 Modeline "1024x768" 97.84 1024 1088 1200 1376 768 769 772 808 Modeline "1024x768" 86.18 1024 1088 1200 1376 768 769 772 803 Modeline "1024x768" 73.89 1024 1080 1192 1360 768 769 772 799 Modeline "1024x768" 61.89 1024 1080 1184 1344 768 769 772 794 Modeline "800x600" 97.59 800 856 944 1088 600 601 604 650 Modeline "800x600" 90.10 800 856 944 1088 600 601 604 647 Modeline "800x600" 82.55 800 856 944 1088 600 601 604 643 Modeline "800x600" 73.98 800 848 936 1072 600 601 604 639 Modeline "800x600" 66.71 800 848 936 1072 600 601 604 635 Modeline "800x600" 58.73 800 840 928 1056 600 601 604 632 Modeline "800x600" 51.73 800 840 928 1056 600 601 604 628 Modeline "800x600" 44.13 800 840 920 1040 600 601 604 624 Modeline "800x600" 36.88 800 832 912 1024 600 601 604 621 Modeline "768x576" 89.56 768 824 904 1040 576 577 580 624 Modeline "768x576" 82.67 768 824 904 1040 576 577 580 621 Modeline "768x576" 75.72 768 824 904 1040 576 577 580 617 Modeline "768x576" 67.79 768 816 896 1024 576 577 580 613 Modeline "768x576" 61.21 768 816 896 1024 576 577 580 610 Modeline "768x576" 53.75 768 808 888 1008 576 577 580 606 Modeline "768x576" 47.41 768 808 888 1008 576 577 580 603 Modeline "768x576" 40.41 768 800 880 992 576 577 580 599 Modeline "768x576" 33.74 768 792 872 976 576 577 580 596 Modeline "640x480" 62.12 640 680 752 864 480 481 484 521 Modeline "640x480" 57.18 640 680 752 864 480 481 484 517 Modeline "640x480" 51.43 640 680 744 848 480 481 484 514 Modeline "640x480" 46.80 640 680 744 848 480 481 484 511 Modeline "640x480" 42.22 640 680 744 848 480 481 484 508 Modeline "640x480" 36.97 640 672 736 832 480 481 484 505 Modeline "640x480" 32.64 640 672 736 832 480 481 484 503 Modeline "640x480" 27.74 640 664 728 816 480 481 484 500 Modeline "640x480" 23.06 640 656 720 800 480 481 484 497 EndSection

Section "Modes" Identifier "Modes[1]" # Modeline "1280x1024" 165.29 1280 1360 1496 1728 1024 1025 1028 1077 # Modeline "1280x960" 155.01 1280 1376 1512 1744 960 961 964 1010 # Modeline "1280x960" 135.32 1280 1368 1504 1728 960 961 964 1004 # Modeline "1280x960" 116.18 1280 1360 1496 1712 960 961 964 998 # Modeline "1280x960" 97.68 1280 1352 1488 1696 960 961 964 993 # Modeline "1280x800" 160.48 1280 1376 1512 1744 800 801 804 852 # Modeline "1280x800" 144.76 1280 1376 1512 1744 800 801 804 847 # Modeline "1280x800" 128.04 1280 1368 1504 1728 800 801 804 842 # Modeline "1280x800" 111.77 1280 1360 1496 1712 800 801 804 837 # Modeline "1280x800" 95.95 1280 1352 1488 1696 800 801 804 832 # Modeline "1280x800" 80.58 1280 1344 1480 1680 800 801 804 827 # Modeline "1152x864" 140.45 1152 1232 1360 1568 864 865 868 914 # Modeline "1152x864" 125.43 1152 1232 1360 1568 864 865 868 909 # Modeline "1152x864" 109.43 1152 1224 1352 1552 864 865 868 904 # Modeline "1152x864" 93.90 1152 1224 1344 1536 864 865 868 899 # Modeline "1152x864" 78.82 1152 1216 1336 1520 864 865 868 894 # Modeline "1280x768" 154.07 1280 1376 1512 1744 768 769 772 818 # Modeline "1280x768" 137.68 1280 1368 1504 1728 768 769 772 813 # Modeline "1280x768" 122.87 1280 1368 1504 1728 768 769 772 808 # Modeline "1280x768" 107.23 1280 1360 1496 1712 768 769 772 803 # Modeline "1280x768" 92.15 1280 1352 1488 1696 768 769 772 799 # Modeline "1280x768" 77.37 1280 1344 1480 1680 768 769 772 794 Modeline "1024x768" 122.97 1024 1096 1208 1392 768 769 772 818 Modeline "1024x768" 110.91 1024 1096 1208 1392 768 769 772 813 Modeline "1024x768" 97.84 1024 1088 1200 1376 768 769 772 808 Modeline "1024x768" 86.18 1024 1088 1200 1376 768 769 772 803 Modeline "1024x768" 73.89 1024 1080 1192 1360 768 769 772 799 Modeline "1024x768" 61.89 1024 1080 1184 1344 768 769 772 794 Modeline "800x600" 97.59 800 856 944 1088 600 601 604 650 Modeline "800x600" 90.10 800 856 944 1088 600 601 604 647 Modeline "800x600" 82.55 800 856 944 1088 600 601 604 643 Modeline "800x600" 73.98 800 848 936 1072 600 601 604 639 Modeline "800x600" 66.71 800 848 936 1072 600 601 604 635 Modeline "800x600" 58.73 800 840 928 1056 600 601 604 632 Modeline "800x600" 51.73 800 840 928 1056 600 601 604 628 Modeline "800x600" 44.13 800 840 920 1040 600 601 604 624 Modeline "800x600" 36.88 800 832 912 1024 600 601 604 621 Modeline "768x576" 89.56 768 824 904 1040 576 577 580 624 Modeline "768x576" 82.67 768 824 904 1040 576 577 580 621 Modeline "768x576" 75.72 768 824 904 1040 576 577 580 617 Modeline "768x576" 67.79 768 816 896 1024 576 577 580 613 Modeline "768x576" 61.21 768 816 896 1024 576 577 580 610 Modeline "768x576" 53.75 768 808 888 1008 576 577 580 606 Modeline "768x576" 47.41 768 808 888 1008 576 577 580 603 Modeline "768x576" 40.41 768 800 880 992 576 577 580 599 Modeline "768x576" 33.74 768 792 872 976 576 577 580 596 Modeline "640x480" 62.12 640 680 752 864 480 481 484 521 Modeline "640x480" 57.18 640 680 752 864 480 481 484 517 Modeline "640x480" 51.43 640 680 744 848 480 481 484 514 Modeline "640x480" 46.80 640 680 744 848 480 481 484 511 Modeline "640x480" 42.22 640 680 744 848 480 481 484 508 Modeline "640x480" 36.97 640 672 736 832 480 481 484 505 Modeline "640x480" 32.64 640 672 736 832 480 481 484 503 Modeline "640x480" 27.74 640 664 728 816 480 481 484 500 Modeline "640x480" 23.06 640 656 720 800 480 481 484 497 EndSection

Section "Screen" DefaultDepth 24 SubSection "Display" Depth 15 Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480" EndSubSection SubSection "Display" Depth 16 Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480" EndSubSection SubSection "Display" Depth 24 Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480" EndSubSection SubSection "Display" Depth 32 Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480" EndSubSection SubSection "Display" Depth 8 Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480" EndSubSection Device "Matrox[0]" Identifier "Screen[0]" Monitor "Monitor[0]" EndSection

Section "Screen" DefaultDepth 24 SubSection "Display" Depth 15 Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480" EndSubSection SubSection "Display" Depth 16 Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480" EndSubSection SubSection "Display" Depth 24 Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480" EndSubSection SubSection "Display" Depth 32 Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480" EndSubSection SubSection "Display" Depth 8 Modes "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480" EndSubSection Device "Matrox[1]" Identifier "Screen[1]" Monitor "Monitor[1]" EndSection

Section "ServerLayout" Identifier "Layout[all]" InputDevice "Keyboard[0]" "CoreKeyboard" InputDevice "Mouse[1]" "CorePointer" Option "Clone" "off" Option "Xinerama" "on" Screen "Screen[0]" LeftOf "Screen[1]" Screen "Screen[1]" 0 0

EndSection