Arch Linux

ninjageckoattack

Member

Registered: 2010-11-08

Posts: 2

NVIDIA TwinView cannot find second screen

I am trying to install Arch for the first time on my Mac Mini.  I followed the Beginners' Guide, Xorg, and NVIDIA pages.
I set up xorg.conf by running nvidia-xconfig --twinview
My 10-monitor.conf file looks like

Section "ServerLayout"
    Identifier     "DualSreen"
    Screen       0 "Screen0"
    Screen       1 "Screen1" RightOf "Screen0" #Screen1 at the right of Screen0
    Option         "Xinerama" "1" #To move windows between screens
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    Option         "Enable" "true" 
EndSection

Section "Monitor"
    Identifier     "Monitor1"
    Option         "Enable" "true"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    Screen         0
EndSection

Section "Device"
    Identifier     "Device1"
    Driver         "nvidia"
    Screen         1
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "0"
    SubSection "Display"
        Depth          24
        Modes          "1280x800_75.00"
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Screen1"
    Device         "Device1"
    Monitor        "Monitor1"
    DefaultDepth   24
    Option         "TwinView" "0"
    SubSection "Display"
        Depth          24
    EndSubSection
EndSection

I have two monitors connected, one through Mini DisplayPort and one through Mini DVI.
When I run startx, the monitor connected to mini DVI works as expected, showing xterm.  On the other hand, the monitor connected to mini DisplayPort flashes on (to a black screen saying no signal) and off.  When I look at startx's output, it says:

(EE) NVIDIA(1): Unable to find available Display Devices for screen 1.
(EE) NVIDIA(1): No display devices found for this X screen.
(EE) NVIDIA(GPU-0): Acer P224W (DFP-2): DisplayPort link training failed

I have had this same problem on multiple other distros of Linux.  The screen works just fine when I am simply at a command prompt (or whatever it's called) outside of X or when I am in another operating system.
Thanks for any help with this issue.

EDIT: However, when starting X via the kdm daemon, the DisplayPort screen turns on, but it is not detected correctly.  In nvidia-settings, its highest resolution is listed as 640x480, and the model name is listed as "DFP-2"

Last edited by ninjageckoattack (2010-11-08 03:53:31)

ninjageckoattack

Member

Registered: 2010-11-08

Posts: 2

Re: NVIDIA TwinView cannot find second screen

The problem, strangely enough, was the Mini DisplayPort to VGA adapter.  Trying it with a MiniDisplayPort to DVI adapter fixed it.