widescreen TFT display (DVI)

[muxec]

I just replaced my old 4:3 CRT with Widescreen LCD. It is CMV 938D. It is 1440x900 60Hz TFT connected via DVI. When xorg starts the display shuts down with "No signal" message. Using latest Ubuntu. The old config working with old CRT is

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 1.0  (buildmeister@builder3)  Mon May 15 13:23:42 PDT 2006

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0"
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
EndSection

Section "Files"
    RgbPath         "/usr/X11R6/lib/X11/rgb"
EndSection

Section "Module"
    Load           "dbe"
    Load           "extmod"
    Load           "type1"
    Load           "freetype"
    Load           "glx"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Unknown"
    HorizSync       30.0 - 110.0
    VertRefresh     50.0 - 150.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    SubSection     "Display"
        Depth       24
        Modes      "1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
    EndSubSection
EndSection

Straightforward replacing of the modes does not help.

2 questions:

1. What do I need to change to start Xorg with this display?
2. Windows can easily detect possible modes of all monitors, why linux can't?

[sdousley]

You will need to add a line to the "Screen" section of xorg that says:

Option		"UseDisplayDevice"	"DFP"

(DFP = Digital Flat Panel or TFT)
This will tell xorg to use the DVI output rather than the standard VGA output

[muxec]

Did not work. What else?

[sdousley]

here's my xorg.conf:

Section "Module"
    SubSection  "extmod"
    EndSubSection
    Load        "freetype"
    Load       "glx"
EndSection


Section "Files"
    FontPath   "/usr/share/fonts/100dpi/"
    FontPath   "/usr/share/fonts/misc/"
    FontPath   "/usr/share/fonts/TTF/"
    FontPath   "/usr/share/fonts/Type1/"
    FontPath   "/usr/share/fonts/75dpi/"
    FontPath   "/usr/share/fonts/local/"
EndSection


Section "InputDevice"
    Identifier  "Keyboard1"
    Driver      "kbd"
    Option "AutoRepeat" "500 30"
    Option "XkbRules"   "xorg"
    Option "XkbModel"   "pc101"
    Option "XkbLayout"  "gb"
EndSection

Section "InputDevice"
    Identifier  "Mouse1"
    Driver      "mouse"
    Option "Protocol" "auto"
    Option "Device" "/dev/input/mice"
    Option "Buttons" "5"
    option "ZAxisMapping" "4 5"
EndSection

Section "Monitor"
    Identifier  "RelisysTE770"
    VendorName  "Relisys"
    ModelName   "TE770"
    Option "DPMS" "on"
    HorizSync   60-75
    VertRefresh 60-75
    DisplaySize 338 270
EndSection

Section "Device"
    Identifier  "Standard VGA"
    VendorName  "Unknown"
    BoardName   "Unknown"
    Driver     "vga"
EndSection

Section "Device"
    Identifier  "GraphicForceGF2MX400"
    Driver      "nvidia"
    VideoRam    131072
    Option "RenderAccel" "true"
    Option "AllowGLXWithComposite" "true"
    Option "UseDisplayDevice" "DFP"
EndSection

Section "Screen"
    Identifier  "Screen 1"
    Device      "GraphicForceGF2MX400"
    Monitor     "RelisysTE770"
    DefaultDepth 24

    Subsection "Display"
        Depth       8
        Modes       "1280x1024" "1024x768" "800x600" "640x480"
        ViewPort    0 0
    EndSubsection
    Subsection "Display"
        Depth       16
        Modes       "1440x900" "1280x1024" "1024x768" "800x600" "640x480"
        ViewPort    0 0
    EndSubsection
    Subsection "Display"
        Depth       24
        Modes       "1440x900" "1280x1024" "1024x768" "800x600" "640x480"
        ViewPort    0 0
    EndSubsection
EndSection

Section "ServerLayout"
    Identifier  "Simple Layout"
    Screen "Screen 1"
    InputDevice "Mouse1" "CorePointer"
    InputDevice "Keyboard1" "CoreKeyboard"
EndSection


Section "Extensions"
    Option "Composite" "Enable"
EndSection

Take a look thru and see if anything there helps.

What graphics card do you use? That may also help since that option i *think* is an Nvidia option

[muxec]

OK,
Option "UseDisplayDevice" "DFP"
must be in videocard not in display. Trying.

Update:
Thank you, it works now.

BTW do you have any stability problems with RenderAccel enabled?

[sdousley]

in terms of X running, none at all!! Had my PC up for 45 days before reinstalling (not because X died, various minor niggly type issues). And dont think X died on me once, may have restarted a few times manually, but not noticed any issues with that enabled.