Add X11 to a BeagleBone IoT image

README.md

As 'root' perform the following:

git clone https://gist.github.com/jadonk/39d0fcfc323347d88e995cdfee02bdad
apt-get install -y --no-install-recommends xinput xinput-calibrator xorg xserver-xorg-video-fbdev \
    xserver-xorg-video-modesetting lightdm xserver-xorg-core xserver-xorg-input-joystick \
    dbus-x11 openbox cmst compton-conf libfm-tools libgl1-mesa-dri lximage-qt	\
    lxqt-about lxqt-admin lxqt-common lxqt-config lxqt-globalkeys lxqt-notificationd	\
    lxqt-panel lxqt-policykit lxqt-runner lxqt-session lxqt-sudo	\
    obconf pcmanfm-qt qterminal \
    xserver-xorg-video-omap read-edid
systemctl set-default graphical.target
39d0fcfc323347d88e995cdfee02bdad/setup_desktop.sh

iot-lxqt.diff

3c3
< image_type="iot"
---
> image_type="lxqt-2gb"
17,18d16
< 	alsa-utils	\
< 	apache2	\
31a30
> 	dbus-x11	\
36,39d34
< 	firmware-atheros	\
< 	firmware-ralink	\
< 	firmware-realtek	\
< 	firmware-zd1211	\
43d37
< 	hdparm	\
45d38
< 	hostapd	\
50d42
< 	iperf	\
55d46
< 	libdbus-1-dev	\
56a48
> 	lightdm	\
63a56
> 	openbox	\
66c59
< 	ppp	\
---
> 	read-edid	\
74d66
< 	u-boot-tools	\
78d69
< 	v4l-utils	\
83c74,78
< 	wvdial	\
---
> 	xinput	\
> 	xinput-calibrator	\
> 	xorg	\
> 	xserver-xorg-video-fbdev	\
> 	xserver-xorg-video-modesetting	\
101,102d95
< 	pylint	\
< 	python-dbus	\
104d96
< 	python-flask	\
116,117c108,109
< rfs_default_desktop=""
< rfs_desktop_background=""
---
> rfs_default_desktop="lxqt"
> rfs_desktop_background="/opt/scripts/images/beaglebg.jpg"
131d122
< 	bb-node-red-installer	\
133d123
< 	bone101	\
134a125
> 	bone101	\
135a127,128
> 	cmst	\
> 	compton-conf	\
138,143c131,132
< 	doc-beaglebonegreen-getting-started	\
< 	doc-seeed-bbgw-getting-started	\
< 	haveged	\
< 	libsoc-dev	\
< 	libsoc2	\
< 	linux-headers-4.4.19-ti-r41	\
---
> 	libfm-tools	\
> 	libgl1-mesa-dri	\
144a134,148
> 	lximage-qt	\
> 	lxqt-about	\
> 	lxqt-admin	\
> 	lxqt-common	\
> 	lxqt-config	\
> 	lxqt-globalkeys	\
> 	lxqt-notificationd	\
> 	lxqt-panel	\
> 	lxqt-policykit	\
> 	lxqt-runner	\
> 	lxqt-session	\
> 	lxqt-sudo	\
> 	obconf	\
> 	pcmanfm-qt	\
> 	qterminal	\
147,148d150
< 	ti-pru-cgt-installer	\
< 	ti-wlconf	\
150c152
< 	upm	\
---
> 	xserver-xorg-video-omap	\

setup_desktop.sh

#!/bin/bash

# Per https://github.com/beagleboard/image-builder/blob/master/configs/bb.org-debian-jessie-lxqt-4gb-v4.4.conf
# and https://github.com/beagleboard/image-builder/blob/master/target/chroot/beagleboard.org-jessie.sh

rfs_username="debian"
rfs_default_desktop="lxqt"
rfs_desktop_background="/opt/scripts/images/beaglebg.jpg"

setup_desktop () {
	if [ -d /etc/X11/ ] ; then
		wfile="/etc/X11/xorg.conf"
		echo "Patching: ${wfile}"
		echo "Section \"Monitor\"" > ${wfile}
		echo "        Identifier      \"Builtin Default Monitor\"" >> ${wfile}
		echo "EndSection" >> ${wfile}
		echo "" >> ${wfile}
		echo "Section \"Device\"" >> ${wfile}
		echo "        Identifier      \"Builtin Default fbdev Device 0\"" >> ${wfile}

#		echo "        Driver          \"modesetting\"" >> ${wfile}
#		echo "        Option          \"AccelMethod\"   \"none\"" >> ${wfile}
		echo "        Driver          \"fbdev\"" >> ${wfile}

		echo "#HWcursor_false        Option          \"HWcursor\"          \"false\"" >> ${wfile}

		echo "EndSection" >> ${wfile}
		echo "" >> ${wfile}
		echo "Section \"Screen\"" >> ${wfile}
		echo "        Identifier      \"Builtin Default fbdev Screen 0\"" >> ${wfile}
		echo "        Device          \"Builtin Default fbdev Device 0\"" >> ${wfile}
		echo "        Monitor         \"Builtin Default Monitor\"" >> ${wfile}
		echo "        DefaultDepth    16" >> ${wfile}
		echo "EndSection" >> ${wfile}
		echo "" >> ${wfile}
		echo "Section \"ServerLayout\"" >> ${wfile}
		echo "        Identifier      \"Builtin Default Layout\"" >> ${wfile}
		echo "        Screen          \"Builtin Default fbdev Screen 0\"" >> ${wfile}
		echo "EndSection" >> ${wfile}
	fi

	wfile="/etc/lightdm/lightdm.conf"
	if [ -f ${wfile} ] ; then
		echo "Patching: ${wfile}"
		sed -i -e 's:#autologin-user=:autologin-user='$rfs_username':g' ${wfile}
		sed -i -e 's:#autologin-session=UNIMPLEMENTED:autologin-session='$rfs_default_desktop':g' ${wfile}
		if [ -f /opt/scripts/3rdparty/xinput_calibrator_pointercal.sh ] ; then
			sed -i -e 's:#display-setup-script=:display-setup-script=/opt/scripts/3rdparty/xinput_calibrator_pointercal.sh:g' ${wfile}
		fi
	fi

	if [ ! "x${rfs_desktop_background}" = "x" ] ; then
		mkdir -p /home/${rfs_username}/.config/ || true
		if [ -d /opt/scripts/desktop-defaults/jessie/lxqt/ ] ; then
			cp -rv /opt/scripts/desktop-defaults/jessie/lxqt/* /home/${rfs_username}/.config
		fi
		chown -R ${rfs_username}:${rfs_username} /home/${rfs_username}/.config/
	fi

	#Disable dpms mode and screen blanking
	#Better fix for missing cursor
	wfile="/home/${rfs_username}/.xsessionrc"
	echo "#!/bin/sh" > ${wfile}
	echo "" >> ${wfile}
	echo "xset -dpms" >> ${wfile}
	echo "xset s off" >> ${wfile}
	echo "xsetroot -cursor_name left_ptr" >> ${wfile}
	chown -R ${rfs_username}:${rfs_username} ${wfile}

#	#Disable LXDE's screensaver on autostart
#	if [ -f /etc/xdg/lxsession/LXDE/autostart ] ; then
#		sed -i '/xscreensaver/s/^/#/' /etc/xdg/lxsession/LXDE/autostart
#	fi

	#echo "CAPE=cape-bone-proto" >> /etc/default/capemgr

#	#root password is blank, so remove useless application as it requires a password.
#	if [ -f /usr/share/applications/gksu.desktop ] ; then
#		rm -f /usr/share/applications/gksu.desktop || true
#	fi

#	#lxterminal doesnt reference .profile by default, so call via loginshell and start bash
#	if [ -f /usr/bin/lxterminal ] ; then
#		if [ -f /usr/share/applications/lxterminal.desktop ] ; then
#			sed -i -e 's:Exec=lxterminal:Exec=lxterminal -l -e bash:g' /usr/share/applications/lxterminal.desktop
#			sed -i -e 's:TryExec=lxterminal -l -e bash:TryExec=lxterminal:g' /usr/share/applications/lxterminal.desktop
#		fi
#	fi

}

setup_desktop

Thanks a lot! You rock!