xrandr with metamodes

[muzzol]

hi!

im trying to configure a dual setup configuration on my laptop. i want basically two modes

* DFP 1280 - CRT off
* DFP 1024 - CRT 1024 (clone)

so i want to switch between my laptop display and laptop+external monitor display.

i setup metamodes with nvidia-settings and write to xorg.conf, but when i try to change it from xrandr i get a 2048 not cloned desktop. is there any additional setting i must write in xorg.conf?

related information:

$ xrandr 
 SZ:    Pixels          Physical       Refresh
*0   1280 x 800    ( 433mm x 270mm )  *50  
 1   2048 x 768    ( 693mm x 260mm )   51  
 2   2048 x 800    ( 694mm x 271mm )   50  
Current rotation - normal
Current reflection - none
Rotations possible - normal 
Reflections possible - none

$ cat /etc/X11/xorg.conf
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 1.0  (buildmeister@builder3)  Sat May 26 01:05:11 PDT 2007

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    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 "ServerFlags"
    Option         "Xinerama" "0"
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      "Nvidia Default Flat Panel"
    HorizSync       29.0 - 49.0
    VertRefresh     0.0 - 60.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Videocard0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce Go 7600"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Videocard0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "1"
    Option         "metamodes" "DFP: 1280x800 +0+0, CRT: NULL; DFP: 1024x768 +0+0, CRT: nvidia-auto-select +1024+0"
    SubSection     "Display"
        Depth       24
        Modes      "1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
    EndSubSection
EndSection

thanks in advance

[AaronP]

If you want clone mode for your second metamode, you should specify a pan offset of +0+0 for the CRT rather than +1024+0, which places it to the right of the DFP.

[muzzol]

well, that works only if i have the external monitor connected before starting GDM. isn't there a way to refresh that detection through command line?

[lloeki]

not exactly what you're looking for, but maybe Option "ConnectedMonitor" "string" in xorg.conf. details here

[muzzol]

correct me if im wrong, with that option you force your card to believe there's a connected monitor always.

i dont feel very confortable with that option.

[hvengel]

The main issue is that it will use slightly more power because of connector is powered up. On a laptop this is an issue.