View source for Linux Virtual Display for iPad Pro

==Gnome Remote==
 sudo ufw allow 5900/tcp
 sudo ufw status verbose
 systemctl --user restart gnome-remote-desktop.service
 systemctl --user status  gnome-remote-desktop.service
 
 gsettings set org.gnome.desktop.remote-desktop.rdp screen-share-mode extend

==Linux Display Driver==
===10-amdgpu.conf===
----
<source lang='bash'>
if [[ ! -e /usr/share/X11/xorg.conf.d/10-amdgpu.conf ]];then
cat << EOF | sudo tee /usr/share/X11/xorg.conf.d/10-amdgpu.conf >/dev/null
Section "OutputClass"
        Identifier "AMDgpu"
        MatchDriver "amdgpu"
        Driver "amdgpu"
EndSection
EOF
fi
</source>

===10-nvidia.conf===
----
<source lang='bash'>
if [[ ! -e /usr/share/X11/xorg.conf.d/10-nvidia.conf ]];then
cat << EOF | sudo tee /usr/share/X11/xorg.conf.d/10-nvidia.conf >/dev/null
Section "OutputClass"
    Identifier "nvidia"
    MatchDriver "nvidia-drm"
    Driver "nvidia"
    Option "AllowEmptyInitialConfiguration"
    ModulePath "/usr/lib/x86_64-linux-gnu/nvidia/xorg"
EndSection
EOF
fi
</source>

===10-quirks.conf===
----
<source lang='bash'>
if [[ ! -e /usr/share/X11/xorg.conf.d/10-quirks.conf ]];then
cat << EOF | sudo tee /usr/share/X11/xorg.conf.d/10-quirks.conf >/dev/null
# Collection of quirks and blacklist/whitelists for specific devices.


# Accelerometer device, posts data through ABS_X/ABS_Y, making X unusable
# http://bugs.freedesktop.org/show_bug.cgi?id=22442 
Section "InputClass"
        Identifier "ThinkPad HDAPS accelerometer blacklist"
        MatchProduct "ThinkPad HDAPS accelerometer data"
        Option "Ignore" "on"
EndSection

# https://bugzilla.redhat.com/show_bug.cgi?id=523914
# Mouse does not move in PV Xen guest
# Explicitly tell evdev to not ignore the absolute axes.
Section "InputClass"
        Identifier "Xen Virtual Pointer axis blacklist"
        MatchProduct "Xen Virtual Pointer"
        Option "IgnoreAbsoluteAxes" "off"
        Option "IgnoreRelativeAxes" "off"
EndSection

# https://bugs.freedesktop.org/show_bug.cgi?id=55867
# Bug 55867 - Doesn't know how to tag XI_TRACKBALL
Section "InputClass"
        Identifier "Tag trackballs as XI_TRACKBALL"
        MatchProduct "trackball"
        MatchDriver "evdev"
        Option "TypeName" "TRACKBALL"
EndSection

# https://bugs.freedesktop.org/show_bug.cgi?id=62831
# Bug 62831 - Mionix Naos 5000 mouse detected incorrectly
Section "InputClass"
        Identifier "Tag Mionix Naos 5000 mouse XI_MOUSE"
        MatchProduct "La-VIEW Technology Naos 5000 Mouse"
        MatchDriver "evdev"
        Option "TypeName" "MOUSE"
EndSection
EOF
fi
</source>

===10-radeon.conf===
----
<source lang='bash'>
if [[ ! -e /usr/share/X11/xorg.conf.d/10-radeon.conf ]];then
cat << EOF | sudo tee /usr/share/X11/xorg.conf.d/10-radeon.conf >/dev/null
Section "OutputClass"
	Identifier "Radeon"
	MatchDriver "radeon"
	Driver "radeon"
EndSection
EOF
fi
</source>

===11-nvidia-offload.conf===
----
<source lang='bash'>
if [[ ! -e /usr/share/X11/xorg.conf.d/11-nvidia-offload.conf ]];then
cat << EOF | sudo tee /usr/share/X11/xorg.conf.d/11-nvidia-offload.conf >/dev/null
# DO NOT EDIT. AUTOMATICALLY GENERATED BY gpu-manager

Section "ServerLayout"
    Identifier "layout"
    Option "AllowNVIDIAGPUScreens"
EndSection
EOF
fi
</source>

===20-intel.conf===
----
<source lang='bash'>
if [[ ! -e /usr/share/X11/xorg.conf.d/20-intel.conf ]];then
cat << EOF | sudo tee /usr/share/X11/xorg.conf.d/20-intel.conf >/dev/null
Section "Device"
    Identifier "intelgpu0"
    Driver "intel"
    Option "VirtualHeads" "2"
EndSection
EOF
fi
</source>

===30-virtscreen.conf===
----
<source lang='bash'>
if [[ ! -e /usr/share/X11/xorg.conf.d/30-virtscreen.conf ]];then
cat << EOF | sudo tee /usr/share/X11/xorg.conf.d/30-virtscreen.conf >/dev/null
# nvidia/nouveau/amdgpu device should be configured first before Intel GPU
Section "Device"
	Identifier "nvidiagpu0"
	Driver     "nvidia" # Because you are using Nvidia proprietary driver. Change to "nouveau" if you are using open source nouveau driver
EndSection

# Then configure intel internal GPU
Section "Device"
	Identifier "intelgpu0"
	Driver     "intel"
	# You may put Option "VirtualHeads" "1" here but it seem you don't need to put this for Ubuntu 18.04.
EndSection
EOF
fi
</source>

===40-libinput.conf===
----
<source lang='bash'>
if [[ ! -e /usr/share/X11/xorg.conf.d/40-libinput.conf ]];then
cat << EOF | sudo tee /usr/share/X11/xorg.conf.d/40-libinput.conf >/dev/null
# Match on all types of devices but joysticks
#
# If you want to configure your devices, do not copy this file.
# Instead, use a config snippet that contains something like this:
#
# Section "InputClass"
#   Identifier "something or other"
#   MatchDriver "libinput"
#
#   MatchIsTouchpad "on"
#   ... other Match directives ...
#   Option "someoption" "value"
# EndSection
#
# This applies the option any libinput device also matched by the other
# directives. See the xorg.conf(5) man page for more info on
# matching devices.

Section "InputClass"
        Identifier "libinput pointer catchall"
        MatchIsPointer "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput keyboard catchall"
        MatchIsKeyboard "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput touchpad catchall"
        MatchIsTouchpad "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput touchscreen catchall"
        MatchIsTouchscreen "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput tablet catchall"
        MatchIsTablet "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection
EOF
fi
</source>

===70-wacom.conf===
----
<source lang='bash'>
if [[ ! -e /usr/share/X11/xorg.conf.d/70-wacom.conf ]];then
cat << EOF | sudo tee /usr/share/X11/xorg.conf.d/70-wacom.conf >/dev/null
# Some of the below input classes appear 3x times, once for each of
# "tablet", "touchscreen", and "touchpad" to ensure that the Wacom
# driver is not accidentally bound to other types of hardware that
# Wacom has made which are not handled by the wacom driver (e.g the
# Wacom Bluetooth Keyboard)
#
# https://sourceforge.net/p/linuxwacom/bugs/294/

Section "InputClass"
        Identifier "Wacom USB tablet class"
        MatchUSBID "056a:*"
        MatchDevicePath "/dev/input/event*"
        MatchIsTablet "true"
        Driver "wacom"
EndSection

Section "InputClass"
        Identifier "Wacom USB touchscreen class"
        MatchUSBID "056a:*"
        MatchDevicePath "/dev/input/event*"
        MatchIsTouchscreen "true"
        Driver "wacom"
EndSection

Section "InputClass"
        Identifier "Wacom USB touchpad class"
        MatchUSBID "056a:*"
        MatchDevicePath "/dev/input/event*"
        MatchIsTouchpad "true"
        Driver "wacom"
EndSection

Section "InputClass"
	Identifier "Wacom tablet class"
	MatchProduct "Wacom|WACOM|PTK-540WL|ISD-V4"
	MatchDevicePath "/dev/input/event*"
	MatchIsTablet "true"
	Driver "wacom"
EndSection

Section "InputClass"
	Identifier "Wacom touchscreen class"
	MatchProduct "Wacom|WACOM|PTK-540WL|ISD-V4"
	MatchDevicePath "/dev/input/event*"
	MatchIsTouchscreen "true"
	Driver "wacom"
EndSection

Section "InputClass"
	Identifier "Wacom touchpad class"
	MatchProduct "Wacom|WACOM|PTK-540WL|ISD-V4"
	MatchDevicePath "/dev/input/event*"
	MatchIsTouchpad "true"
	Driver "wacom"
EndSection

# Serial Wacom devices should always be one of tablet, touchscreen, or
# touchpad so we can safely get away with just one match section in
# these cases
Section "InputClass"
        Identifier "Wacom PnP device class"
        MatchPnPID "WACf*|WCOM*|WACM*|FUJ02e5|FUJ02e7|FUJ02e9"
        MatchDevicePath "/dev/input/event*"
        Driver "wacom"
EndSection

Section "InputClass"
	Identifier "Wacom serial class"
	MatchProduct "Serial Wacom Tablet"
	Driver "wacom"
EndSection

Section "InputClass"
        Identifier "Wacom serial class identifiers"
        MatchProduct "WACf|FUJ02e5|FUJ02e7|FUJ02e9"
        Driver "wacom"
EndSection

# Hanwang tablets
Section "InputClass"
	Identifier "Hanwang class"
	MatchProduct "Hanwang"
	MatchDevicePath "/dev/input/event*"
	Driver "wacom"
EndSection

# Waltop tablets
Section "InputClass"
	Identifier "Waltop class"
	MatchProduct "WALTOP"
	MatchIsTablet "on"
	MatchDevicePath "/dev/input/event*"
	Driver "wacom"
EndSection

# N-Trig Duosense Electromagnetic Digitizer
Section "InputClass"
	Identifier "Wacom N-Trig class"
	MatchProduct "HID 1b96:0001|N-Trig Pen|N-Trig DuoSense"
	MatchDevicePath "/dev/input/event*"
	Driver "wacom"
	Option "Button2" "3"
EndSection

# Dell Canvas 27 (touch part is an Advanced Silicon, pen part a Wacom)
Section "InputClass"
        Identifier "Dell Canvas 27 Touch"
        MatchUSBID "2575:0204"
        MatchDevicePath "/dev/input/event*"
        MatchIsTouchscreen "true"
        Driver "wacom"
EndSection

# Surface Go
Section "InputClass"
        Identifier "SurfaceGo Touch"
        MatchProduct "ELAN9038:00 04F3:261A"
        MatchDevicePath "/dev/input/event*"
        Driver "wacom"
EndSection

# Nuvision Solo 10 Draw (Supports Surface Pens)
Section "InputClass"
        Identifier "Nuvision Solo 10 Draw"
        MatchProduct "04F3200A:00 04F3:22F7"
        MatchDevicePath "/dev/input/event*"
        Driver "wacom"
EndSection
EOF
fi
</source>

==Knowledge==
{|
| valign="top" |
 lsblk
 lscpu
 lsusb
 free -h
 sudo lshw
 
 ufw status
 ufw status verbose
 systemctl status ufw
 apt list --installed

| valign="top" |
 sudo ufw allow http
 sudo ufw allow OpenSSH
 sudo ufw allow 5900/tcp
 
 sudo ss -tulpn | grep LISTEN
 sudo ss -tulwn | grep LISTEN
 sudo ss -tulpn | grep LISTEN | grep sshd
 sudo ss -tulpn | grep LISTEN | grep redis
 sudo ss -tulpn | grep LISTEN | grep gnome
 sudo ss -tulpn | grep LISTEN | grep apache

|-
| colspan="2" |
----
|-
| valign="top" |
 sudo lspci -t
 sudo lspci -v | less
 sudo glxinfo -B | less
 
 sudo lshw -short
 sudo lshw -C system
 sudo lshw -C display
 sudo lshw -C input | less
 sudo lshw -C memory| less

| valign="top" |
 sudo dmidecode -t
 sudo dmidecode -t 1
 sudo dmidecode -t 2
 sudo dmidecode -t 3
 
 sudo dmidecode | less
 sudo dmidecode | grep 'SKU Number'
 sudo dmidecode -s system-product-name
 sudo dmidecode -s system-serial-number

|-
| colspan="2" |
----
|-
| colspan="2" |
 cvt 1600 1200 60
 
 '''virtual display mode description:'''
 cvt 1600 1200 60 | sed -n "s/^.*Modeline\s*\".*\"\s*//p"
 
 '''virtual display mode name based on resolution:'''
 cvt 1600 1200 60 | sed -n "s/^.*Modeline\s*\"\(.*\)\".*/\1/p"

|-
| colspan="2" |
----
|-
| colspan="2" |
<source lang='bash'>
x11vnc -storepasswd
:'
Enter VNC password: 
Verify password:    
Write password to /home/chorke/.vnc/passwd?  [y]/n y
Password written to: /home/chorke/.vnc/passwd
'

/usr/bin/x11vnc -auth guess -forever -loop -noxdamage\
 -repeat -rfbauth /home/chorke/.vnc/passwd -rfbport 5900 -shared
</source>

|-
| colspan="2" |
----
|-
| valign="top" |
 '''display server is wayland|xorg(x11)'''
 echo ${XDG_SESSION_TYPE}

| valign="top" |
 sudo apt install --reinstall x11-common
 sudo systemctl start x11-common.service

|-
| colspan="2" |
----
|-
| valign="top" |
 xdpyinfo|grep -oP 'dimensions:\s+\K\S+'
 xdpyinfo|grep -oP 'dimensions:\s+\K\S+'|cut -d 'x' -f1
 xdpyinfo|grep -oP 'dimensions:\s+\K\S+'|cut -d 'x' -f2 

| valign="top" |
 xrandr --current|grep '*'|uniq|awk '{print $1}'
 xrandr --current|grep '*'|uniq|awk '{print $1}'|cut -d 'x' -f1
 xrandr --current|grep '*'|uniq|awk '{print $1}'|cut -d 'x' -f2

|}

== References ==
{|
| valign="top" |
* [https://www.digitalocean.com/community/tutorials/how-to-set-up-a-firewall-with-ufw-on-ubuntu-22-04 Set Up a Firewall with UFW on Ubuntu 22.04]
* [[Academia JavaEE Workspace in Raspbian]]
* [https://help.gnome.org/users/gnome-help/stable/net-firewall-ports.html.en Gnome Commonly Used Network Ports]
* [[Academia JavaEE Workspace in Ubuntu]]
* [[Academia JavaEE Workspace in MacOS]]
* [https://discussions.apple.com/thread/252596486 iPad Pro Disable Virtual Keyboard]
* [[VS Code on iPad Pro]]
* [[Alpine/Morefine]]
* [[Apple iPad Pro]]
* [https://www.duetdisplay.com/ Duet Display]

| valign="top" |
* [https://support.apple.com/kb/SP814?locale=en_US iPad Pro » 11-inch » 2nd Gen » Specifications]
* [https://www.reddit.com/r/gnome/comments/uz5as7/gnome_has_made_it_super_simple_to_extend_your/ Gnome Remote Extended Virtual Monitor]
* [https://bitsoftomorrow.medium.com/share-your-linux-screen-over-ipad-for-free-77afbf267357 Use iPad as a 2nd Display for Ubuntu]
* [https://kbumsik.io/using-ipad-as-a-2nd-monitor-on-linux Use iPad as a 2nd monitor on Linux]
* [https://askubuntu.com/questions/685761/ X11vnc Service is not Running]
* [https://github.com/kbumsik/VirtScreen/issues/16#issuecomment-439669153 VIRTUAL1 option not available]
* [https://github.com/dianariyanto/virtual-display-linux Linux Remote Virtual Display]
* [https://unix.stackexchange.com/questions/378373/ Add VIRTUAL output to Xorg]
* [https://wiki.archlinux.org/title/xorg Arch Linux » Xorg » X11]
* [https://askubuntu.com/questions/804946/ Unmask <code>systemctl</code>]

| valign="top" |
* [https://askubuntu.com/questions/1084476/ <code>xrandr</code> Not Showing All Ports & Resolutions]
* [https://github.com/kbumsik/VirtScreen/issues/16#issuecomment-865128729 VIRTUAL1 option for AMD Ryzen & Radeon]
* [https://askubuntu.com/questions/584688/ Bash Get the Monitor Resolution]
* [https://help.ubuntu.com/community/VNC/Servers Ubuntu » VNC » Servers]
* [[X11VNC]]

|-
| colspan="3" |
----
|-
| valign="top" |

| valign="top" |

| valign="top" |

|}