Scripts to configure monitor hotplug. It is useful on a laptop that can be connected to some external screens.
In some cases, when monitor configuration changes plank position is not updated accordingly. A workaround consist in restarting plank. It is killed from monnitor_hotplug.sh script and automatically restarted using plank_forever.sh script that is started from xfce startup application menu.
| #/etc/udev/rules.d/95-monitor-hotplug.rules | |
| ACTION=="change", KERNEL=="card[0-9]", SUBSYSTEM=="drm", RUN+="/usr/bin/systemctl start monitor_hot_plug.service" |
| #/etc/systemd/system/monitor_hot_plug.service | |
| [Unit] | |
| Description=Monitor hotplug | |
| [Service] | |
| Type=simple | |
| RemainAfterExit=no | |
| User=remi | |
| ExecStart=/usr/local/bin/monitor_hotplug.sh | |
| [Install] | |
| WantedBy=multi-user.target |
| #!/bin/bash | |
| ###################################### | |
| ## /usr/local/bin/hotplug_monitor.sh | |
| ###################################### | |
| X_USER=remi | |
| MONITOR_0='eDP-1' | |
| MONITOR_2='VGA' | |
| XFCE_PANEL_NAME='panel-1' | |
| export DISPLAY=:0 | |
| export XAUTHORITY=/home/$X_USER/.Xauthority | |
| export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus | |
| function add_monitor() | |
| { | |
| echo "connect monitor $1" | |
| #dual monitor - $1 on right - xfce panel on left of MONITOR_0 | |
| xrandr --output $1 --right-of $MONITOR_0 --preferred --output $1 --primary >> /tmp/screen | |
| #Set xfce panel on primary monitor | |
| # Either use soft solutions but sometimes it does not work | |
| #xfconf-query -v -c xfce4-panel -p /panels/${XFCE_PANEL_NAME}/output-name -s $1 | |
| # Or restart panel | |
| xfce4-panel -r | |
| #reload conky | |
| killall -s SIGUSR1 conky | |
| # kill plank - it will be automatically restarted by plank_forever.sh script | |
| killall -s SIGHUP plank | |
| } | |
| function use_laptop_monitor(){ | |
| xrandr --output $MONITOR_0 | |
| #Set xfce panel on MONITOR_0 | |
| # Either use soft solutions but sometimes it does not work | |
| #xfconf-query -c xfce4-panel -p /panels/${XFCE_PANEL_NAME}/output-name -s $MONITOR_0 | |
| # Or restart panel | |
| xfce4-panel -r | |
| #reload conky | |
| killall -s SIGUSR1 conky | |
| # kill plank - it will be automatically restarted by plank_forever.sh script | |
| killall -s SIGHUP plank | |
| } | |
| # card name can change : https://unix.stackexchange.com/questions/364246/nondeterministic-graphic-cards-device-names | |
| # do not use /sys/class/drm/.../status to get connected devices, they have a different name in xrandr and sys (but we can identify it using edid) | |
| nb_connected_screens_sys_cmd="find /sys/class/drm/*/status -type f -exec grep -ERi "^connected$" {} \; | grep -c "connected"" | |
| nb_connected_screens_sys=$(eval $nb_connected_screens_sys_cmd) | |
| nb_connected_screens_cmd="xrandr |grep -E ' connected ' | grep -c "^.*$"" | |
| nb_connected_screens=$(eval $nb_connected_screens_cmd) | |
| while [ "$nb_connected_screens_sys" -ne "$nb_connected_screens" ] | |
| do | |
| echo "Number of connected screen at sys level : $nb_connected_screens_sys - at xrandr level : $nb_connected_screens" | |
| nb_connected_screens_sys=$(eval $nb_connected_screens_sys_cmd) | |
| nb_connected_screens=$(eval $nb_connected_screens_cmd) | |
| sleep 0.2 | |
| done | |
| echo "number of connected screens = $nb_connected_screens" | |
| # a screen has been removed | |
| if [ $nb_connected_screens -eq 1 ] | |
| then | |
| use_laptop_monitor | |
| # a screen has been added | |
| elif [ $nb_connected_screens -eq 2 ] | |
| then | |
| add_monitor $(xrandr |grep -v 'eDP-1' | grep -E ' connected ' | awk -F ' ' '{print $1}') | |
| else | |
| echo "Cannot handle $nb_connected_screens" | |
| fi | |
| exit 0 | |
| #!/bin/sh | |
| while true | |
| do | |
| if ! pgrep plank | |
| then | |
| echo 'start plank' | |
| plank > /dev/null | |
| fi | |
| sleep 1 | |
| done |