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  1. #1

    TFT screens OK? - Help I'm new here

    OK, so I had an old PIII machine that was going to be junked. So I thought I would look at Linux, Mandrake 10.

    I liked what I saw and thought I would bring the Linux machine into play. However, when I plugged it into my 17" TFT monitor it went through all the text based boot sequence OK and then got to the graphical log in screen.

    On the old CRT monitor it clearly changed screen modes as the monitor blanked and clicked and the image reformed.

    The TFT screen just blanks and then I get a message from the monitor 'input mode not supported'.

    Does the log in screen work in a particular mode? Or can that be changed? Obviously I will have to put the CRT back on to make any changes but I just don't have room for that at home.

    Can it be made to work on TFT or am I going to have to ditch Linux because I don't have room for a CRT?

  2. #2
    Linux Engineer
    Join Date
    Nov 2004
    Montreal, Canada
    Refresh rate is the key
    your CRT may take a 1024x768 at 85Hz while your LCD takes the same res but at 60Hz.... you follow me?

    please post your New screen name and model.
    and post your reading on this command (from terminal)
    cat /etc/X11/XF86Config
    \"Meditative mind\'s is like a vast ocean... whatever strikes the surface, the bottom stays calm\" - Dalai Lama
    \"Competition ultimatly comes down to one thing... a loser and a winner.\" - Ugo Deschamps

  3. #3
    TFT Screen is AOC model LM720A

    I haven't got a file /etc/X11/XFConfig

    This is what is in the X11 folder

    [keith@linux keith]$ dir /etc/X11
    app-defaults prefdm X xinit.d Xsession
    applnk proxymngr xdm xkb xsm
    encodings.dir rstart XF86Config-4 Xmodmap
    fs twm XftConfig.README-OBSOLETE Xresources
    lbxproxy wmsession.d xinit xserver

    The output from XF86Config-4 is as follows.

    # ************************************************** ********************
    # Refer to the XF86Config man page for details about the format of
    # this file.
    # ************************************************** ********************

    Section "Files"
    # Multiple FontPath entries are allowed (they are concatenated together)
    # By default, Mandrake 6.0 and later now use a font server independent of
    # the X server to render fonts.
    FontPath "unix/:-1"

    Section "ServerFlags"
    #DontZap # disable <Crtl><Alt><BS> (server abort)
    AllowMouseOpenFail # allows the server to start up even if the mouse doesn't work
    #DontZoom # disable <Crtl><Alt><KP_+>/<KP_-> (resolution switching)

    Section "Module"
    Load "dbe" # Double-Buffering Extension
    Load "v4l" # Video for Linux
    Load "extmod"
    Load "type1"
    Load "freetype"
    Load "glx" # 3D layer
    Load "dri" # direct rendering

    Section "DRI"
    Mode 0666

    Section "InputDevice"
    Identifier "Keyboard1"
    Driver "Keyboard"
    Option "XkbModel" "pc105"
    Option "XkbLayout" "gb"
    Option "XkbOptions" ""

    Section "InputDevice"
    Identifier "Mouse1"
    Driver "mouse"
    Option "Protocol" "ExplorerPS/2"
    Option "Device" "/dev/mouse"
    Option "ZAxisMapping" "6 7"

    Section "Monitor"
    Identifier "monitor1"
    VendorName "Plug'n Play"
    ModelName "Iiyama MF-8515G, VisionMaster"
    HorizSync 24-69
    VertRefresh 50-160

    # Sony Vaio C1(X,XS,VE,VN)?
    # 1024x480 @ 85.6 Hz, 48 kHz hsync
    ModeLine "1024x480" 65.00 1024 1032 1176 1344 480 488 494 563 -hsync -vsync

    # TV fullscreen mode or DVD fullscreen output.
    # 768x576 @ 79 Hz, 50 kHz hsync
    ModeLine "768x576" 50.00 768 832 846 1000 576 590 595 630

    # 768x576 @ 100 Hz, 61.6 kHz hsync
    ModeLine "768x576" 63.07 768 800 960 1024 576 578 590 616

    Section "Device"
    Identifier "device1"
    VendorName "Matrox"
    BoardName "Matrox Millennium G400 DualHead"
    Driver "mga"
    VideoRam 32768
    Option "DPMS"

    Section "Screen"
    Identifier "screen1"
    Device "device1"
    Monitor "monitor1"
    DefaultColorDepth 24

    Subsection "Display"
    Depth 8
    Virtual 800 600

    Subsection "Display"
    Depth 15
    Virtual 800 600

    Subsection "Display"
    Depth 16
    Virtual 800 600

    Subsection "Display"
    Depth 24
    Virtual 800 600

    Section "ServerLayout"
    Identifier "layout1"
    InputDevice "Keyboard1" "CoreKeyboard"
    InputDevice "Mouse1" "CorePointer"
    Screen "screen1"

    As you can see it was set up for my iiyama CRT which I can't continue to use.

  4. $spacer_open
  5. #4
    OK. Ignore all the above.

    Your reply pointed me in the right direction. I found how to change the refresh rate and exchanged monitors and it works brilliantlly.

    I might even build a better machine to try this on. Every time I look at Linux it is on a machine that is 2 steps from the graveyard, which doesn't do it justice.

    Thanks for the help, a little went a long way!

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