Hi,

I recently purchased a SMS27A850 to use in a dual screen setup on my laptop, an HP 8440p on a docking station. I have the Nvidia 295.40 drivers loaded. The laptop gfx card is an NVS 3100M.

The external screen works fine in TwinView mode but I can only get the resolution to 1920x1080, when the native resolution of the panel is 2560x1440.

I have tried various modelines and settings in xorg.conf but can't seem to hit the winning combo, and so far Google hasn't yielded the settings I need.

Here's the xorg.conf as generated by nvidia-settings:
Code:
Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
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"
    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Samsung SMS27A850"
    HorizSync       30.0 - 90.0
    VertRefresh     56.0 - 75.0
    # added this line
    Modeline       "2560x1440" 241.50  2560 2608 2640 2720  1440 1443 1448 1481 +hsync -vsync
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "NVS 3100M"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "1"
    Option         "TwinViewXineramaInfoOrder" "DFP-3"
    Option         "metamodes" "DFP-1: 1920x1080 +0+0, DFP-3: 1600x900_40 +0+1080"
    # when I enable the next line and disable the one above, the laptop screen resolution is set to something very strange, and the Samsung panel doesn't come on at all!
    #Option         "metamodes" "DFP-1: 2560x1440_60 +0+0, DFP-3: 1600x900_40 +0+1080"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection
Would be grateful of any help or info as at the moment I'm looking at a fuzzy image on an expensive panel!

TIA