Nvidia Dual Head Setup Changing Screen Associations?

[rgoodkin]

Hello,

Currently have a two LCD monitors, one connected to DVI and one connected to analog. For some reason when I configured dual head, it decided, and I haven't been able to change this, that the analog was screen0, and the dvi was screen1. Anyway to swap these??

Thanks!

[badchien]

It's a known problem with the nvidia drivers. When using twinview, if there is an analog device and a DVI device connected, the driver makes the analog the primary screen no matter what.

An nvidia rep acknowledged the problem (or lack of functionality if you like) in this post on nvidia's forums, but without commiting to a date for a fix.
http://www.nvnews.net/vbulletin/showthr ... 9c&t=54638

[CaptainDangeax]

Hi

Did you try

Code: Select all

Option "ConnectedMonitor" "DFP-0, CRT-1"

It worked for me, though I have 2 VGAs and the first one is connected via a DVI2VGA plug converter...

[badchien]

ve 2 VGAs and the first one is connected via a DVI2VGA plug converter.

That is the critical difference. When you have one digital/DVI monitor and one analog crt or lcd monitor, the driver always makes the analog monitor the primary. Some person from nvidia admits (on the forum post I linked) there is no way to set "primary monitor" in this case. If you have two analog or two digital monitors then I think you will not see this problem.


See nvidia driver override my "ConnectedMonitor" "DFP-0, CRT-1"

(**) NVIDIA(0): Option "ConnectedMonitor" "DFP-0, CRT-1"
(**) NVIDIA(0): Option "TwinView" "on"
(**) NVIDIA(0): Option "TwinViewOrientation" "RightOf"
(**) NVIDIA(0): Option "SecondMonitorHorizSync" "30 - 96.0"
(**) NVIDIA(0): Option "SecondMonitorVertRefresh" "50 - 75"
(**) NVIDIA(0): Option "MetaModes" "1024x768,1024x768;1024x768,NULL"
(**) NVIDIA(0): ConnectedMonitor string: "DFP-0, CRT-1"
(**) NVIDIA(0): TwinView enabled
(--) NVIDIA(0): Linear framebuffer at 0xD8000000
(--) NVIDIA(0): MMIO registers at 0xF4000000
(II) NVIDIA(0): NVIDIA GPU detected as: GeForce 6600 GT
(--) NVIDIA(0): VideoBIOS: 05.43.02.23.04
(--) NVIDIA(0): Interlaced video modes are supported on this GPU
(II) NVIDIA(0): Detected PCI Express Link width: 16X
(--) NVIDIA(0): VideoRAM: 131072 kBytes
(II) NVIDIA(0): Using ConnectedMonitor string "CRT-1, DFP-0"

[CaptainDangeax]

Strange...

Since the last time I wrote, I changed my first monitor (the one connected to the DVI via a DVI->VGA) for a Philips 200W6 DVI-D, and I kept the second standard VGA CRT one (LG55V). This config DOES NOT use Nvidia's twinview capacity, but Xorg twinview capacity. BTW, the two screens have separate desktops, and you can't drag a window from one to another. I tryed Nvidia's twinview, but I don't like that new opened windows to be cut between the 2 screens.

My complete Xorg.conf:

Code: Select all

Section "ServerLayout"
    Identifier     "Simple Layout"
    Screen         0 "Screen0" 0 0
    Screen	   1 "Screen1" RightOf "Screen0"
    InputDevice    "Mouse1" "CorePointer"
    InputDevice    "Keyboard1" "CoreKeyboard"
    Option		"NoPM"	"1"
EndSection

Section "Files"
    RgbPath         "/usr/X11R6/lib/X11/rgb"
    FontPath        "/usr/share/fonts/misc/"
    FontPath        "/usr/share/fonts/TTF/"
    FontPath        "/usr/share/fonts/Type1/"
    FontPath        "/usr/share/fonts/75dpi/"
    FontPath        "/usr/share/fonts/100dpi/"
    FontPath        "/usr/share/fonts/local/"
EndSection

Section "Module"
    Load           "dbe"  	# Double buffer extension
    SubSection     "extmod"
        Option         "omit xfree86-dga"   # don't initialise the DGA extension
    EndSubSection
    Load           "type1"
    Load           "freetype"
    Load           "glx"
EndSection

Section "InputDevice"
    Identifier     "Keyboard1"
    Driver         "kbd"
    Option         "AutoRepeat" "250 30"
    Option         "XkbRules" "xorg"
    Option         "XkbModel" "pc105"
    Option         "XkbLayout" "fr-latin9"
EndSection

Section "InputDevice"
    Identifier     "Mouse1"
    Driver         "mouse"
    Option         "Protocol" "ExplorerPS/2"
    Option         "Device" "/dev/input/mice"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "Monitor"
	Identifier	"LG55V"
	HorizSync	30.0 - 54.0
	VertRefresh	50.0 - 100.0
	DisplaySize	284 213
EndSection

Section "Monitor"
	Identifier	"200W6"
	DisplaySize	435 270
EndSection

Section "Device"
	Option "ConnectedMonitor" "DFP-0"
    Identifier     "NVIDIA1"
    Driver         "nvidia"
	BusID	"PCI:1:0:0"
	Screen 0
	Option "FlatPanelProperties" "Scaling = aspect-scaled, Dithering = enabled"
EndSection

Section "Device"
	Option "ConnectedMonitor" "CRT-0"
	Identifier	"NVIDIA2"
	Driver		"nvidia"
	BusID	"PCI:1:0:0"
	Screen 1
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "NVIDIA1"
    Monitor        "200W6"
    DefaultDepth    24
    Option         "XvmcUsesTextures" "1"
    SubSection     "Display"
        Viewport    0 0
        Depth       8
        Modes      "1680x1050"
    EndSubSection
    SubSection     "Display"
        Viewport    0 0
        Depth       16
        Modes      "1680x1050"
    EndSubSection
    SubSection     "Display"
        Viewport    0 0
        Depth       24
        Modes      "1680x1050"
    EndSubSection
EndSection

Section "Screen"
	Identifier	"Screen1"
	Device		"NVIDIA2"
	Monitor		"LG55V"
	DefaultDepth	24
	SubSection	"Display"
		Viewport	0 0
		Depth		8
		Modes		"1024x768"
	EndSubSection
	SubSection	"Display"
		Viewport	0 0
		Depth		16
		Modes		"1024x768"
	EndSubSection
	SubSection	"Display"
		Viewport	0 0
		Depth		24
		Modes		"1024x768"
	EndSubSection
EndSection

[badchien]

Yes, if you don't use twinview then that will work. That is expected, because you have two independant desktops. But as you said you can't move windows between them.

I have little hope that nvidia will fix the twinview problem. I think I am just going to get two DVI monitors instead and then it won't matter.

[CaptainDangeax]

Hi again
I recently upgraded the NVidia package from 81.74 to 87.something. Now I'm not able to get dual display to work anymore. I'm able to have the VGA as first and the DVI as second, but, guess what ? That's not what I want to use : I want the DVI at first. So I went to a NVIDIA-Twinview resolution, with the DVI on the left at 1680x1050 and the VGA on the right at 1400x1050. I cannot attach my new xorg.conf for the moment, the gentoo box is in use to test Vista (arggh!)