Arch Linux

dsal3389

Member

Registered: 2020-09-10

Posts: 1

xrandr does not detect second screen but nvidia does?!?!??!

hey, I have installed nvidia drivers with 2 monitors, I am using 1 layout to display two screens (given default by nvidia-settings)

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 450.57

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0"
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
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"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Unknown"
    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
    EndSubSection
EndSection

so when I record or share screen it looks like this:
https://imgur.com/gLoxIcT

I cant focus on 1 monitor, so I have changed the config file to make both "diff" screens

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 450.57

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 450.57

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 1600 0
    Screen      1  "Screen1" LeftOf "Screen0"
    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"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Samsung C24F390"
    HorizSync       30.0 - 82.0
    VertRefresh     50.0 - 72.0
    Option         "DPMS"
EndSection

Section "Monitor"
    Identifier     "Monitor1"
    VendorName     "Unknown"
    ModelName      "HP S2031"
    HorizSync       24.0 - 83.0
    VertRefresh     50.0 - 76.0
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GTX 970"
    BusID          "PCI:1:0:0"
    Screen          0
EndSection

Section "Device"
    Identifier     "Device1"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GTX 970"
    BusID          "PCI:1:0:0"
    Screen          1
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "DFP-1"
    Option         "metamodes" "HDMI-0: nvidia-auto-select +0+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Screen1"
    Device         "Device1"
    Monitor        "Monitor1"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "metamodes" "DVI-I-1: nvidia-auto-select +0+0 {AllowGSYNC=Off}"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

now my second screen look exactly like this (took from: https://www.nvidia.com/en-us/geforce/fo … -running/):
https://i.imgur.com/yiehQn6.jpg

I have tried everything, I have added/removed `nomodeset` from the grub arg  even added `ConnectedMonitor` option to the xorg.conf, nothing seems to work, when I use the new settings and
do

>>> xrandr -q

only the primary sreen is shown, and when I look in `nvidia-setting` I see both monitors, how? how can I fix it so I be able to focus on a pacific screen?

Mod note: -- Removed oversized image -- V1del

Last edited by V1del (2020-09-10 17:55:49)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,371

Re: xrandr does not detect second screen but nvidia does?!?!??!

Welcome to the boards,

Please familiarize yourself with our guidelines regarding linked image sizes: https://wiki.archlinux.org/index.php/Co … s_and_code

That out of the way, I entirely expect your screen to look like in the image and xrandr to only show you one screen with that configuration. Multiple xorg screens logically disjoints them from each other, if you want something shown on the "black" screen start your applications with DISPLAY=:1. Assuming that isn't really what you want I suggest you remove all of these configuration files, start the system and then post the output of

xrandr -q

along with a plain description of how it looks in that state, what your ultimate end goal is, and which streaming software you intend to use here.

Last edited by V1del (2020-09-10 18:03:13)