How to I remove the "DUmmy Monitor" from my xorg setting?

[devensd1]

I did a really silly thing and deleted my backup file. Now all I have is the xorg.conf file which outputs:

Section “Device”
Identifier “DummyDevice”
Driver “dummy”
VideoRam 256000
EndSection

Section “Screen”
Identifier “DummyScreen”
Device “DummyDevice”
Monitor “DummyMonitor”
DefaultDepth 24
SubSection “Display”
Depth 24
Modes “1440x900_60.0”
EndSubSection
EndSection

Section “Monitor”
Identifier “DummyMonitor”
HorizSync 30-70
VertRefresh 50-75
ModeLine “1920x1080” 148.50 1920 2448 2492 2640 1080 1084 1089 1125 +Hsync +Vsync
EndSection
deven@deven-desktop:/etc/X11$ ls
app-defaults fonts xkb xorg.conf.d Xresources Xsession.options
cursors rgb.txt Xloadimage Xreset Xsession xsm
default-display-manager xinit xorg.conf Xreset.d Xsession.d Xwrapper.config
deven@deven-desktop:/etc/X11$ cat xorg.conf
Section “Device”
Identifier “DummyDevice”
Driver “dummy”
VideoRam 256000
EndSection

Section “Screen”
Identifier “DummyScreen”
Device “DummyDevice”
Monitor “DummyMonitor”
DefaultDepth 24
SubSection “Display”
Depth 24
Modes “1440x900_60.0”
EndSubSection
EndSection

Section “Monitor”
Identifier “DummyMonitor”
HorizSync 30-70
VertRefresh 50-75
ModeLine “1920x1080” 148.50 1920 2448 2492 2640 1080 1084 1089 1125 +Hsync +Vsync
EndSection

I think an easy fix would be to over ride these settings but I’m worried there is a driver being detect to trick the system. I’ve tied unplugging my monitor and this keeps happening after reboots. ctrl+alt+F(keys) don’t work either.

I’ve also tried ssh -X (my ip) then run Nautilaus and I get this error.
(org.gnome.Nautilus:73188): Gtk-WARNING **: 10:10:47.751: cannot open display:

How can I “reset” xorg to detect a monitor like usual? Do I have to restore my machine?

[linuxdev]

It might depend on whether this is L4T R35.x or R36.x, but here is an R35.x version (file name “/etc/X11/xorg.conf”):

# Copyright (c) 2011-2013 NVIDIA CORPORATION.  All Rights Reserved.

#
# This is the minimal configuration necessary to use the Tegra driver.
# Please refer to the xorg.conf man page for more configuration
# options provided by the X server, including display-related options
# provided by RandR 1.2 and higher.

# Disable extensions not useful on Tegra.
Section "Module"
    Disable     "dri"
    SubSection  "extmod"
        Option  "omit xfree86-dga"
    EndSubSection
EndSection

Section "Device"
    Identifier  "Tegra0"
    Driver      "nvidia"
# Allow X server to be started even if no display devices are connected.
    Option      "AllowEmptyInitialConfiguration" "true"
EndSection

However, there may be other issues, so I won’t guarantee that fixes it. If you do end up reflashing, then keep in mind that you can clone first and do things like use your original home directory content directly in the new flash.

[devensd1]

Update.

I went ahead an connected it to my Ubuntu host with like you would do a Jetpack upgrade, but just upgraded minimal upgrade for Object Detection. Now the system connects to the monitor.

BUT a new problem emerged as now I want to use ssh -X forwarding from my Mac client. It give me a Error: Can’t open display.

I’ve tried enabling forwarding and Gateway forwarding.

[linuxdev]

Your Mac would need an X server. When you have a GUI on Linux (normally, without Vulkan, since this changes things), there are both X client and server on the Linux box. When forwarding from one Linux box to the next, the client is on one machine, and the server on another. In order to use that form of port forwarding your Mac would have to have an X server (or client? I forget, the nomenclature is a bit odd).

If your Mac actually has that software, then security can still get in the way. The “-X” (or “-Y”) should take care of that, but only at the X client and server side; any firewall may still get in the way.

[devensd1]

Thank you this worked!