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@AGlass0fMilk
Last active May 16, 2020 08:59
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Mixed DPI on Ubuntu - Dell XPS 15 9570 and TB16 dock with 4K internal/1080p external displays
# put the following in a udev rule file
# for example /etc/udev/rules.d/99-tb16-dock.rule
ACTION=="add", SUBSYSTEM=="thunderbolt", ATTR{device_name}=="Dell Thunderbolt Dock", RUN+="/bin/systemctl --no-block start configure-tb16-dock.service"
[Unit]
Description=Configuration changes when connecting Dell TB16 Dock
[Service]
Type=simple
User=<YOUR_USER_NAME>
Environment="DISPLAY=:0"
ExecStartPre=/bin/sleep 8
ExecStart=/home/gdbeckstein/bin/configure_dock.sh
#!/bin/bash
# Run when Dell Thunderbolt Dock is attached and configures displays accordingly
# To have this run automatically when your dock is plugged in
# create a udev rule in /etc/udev/rules.d named 99-tb16-dock.rules
# Also place the other .service file in this gist in /etc/systemd/system
# You may be able to just run this script from the udev rule
# but I made it a systemd service
# Set up frame buffer (add up horizontal since my displays are side by side)
xrandr --fb 7680x2160 &&
# Set up laptop monitor
xrandr --output eDP-1 --mode 3840x2160 --rate 60 --primary &&
# Set up external display(s)
# My configuration only has a 1080p display to the right of my laptop
xrandr --output DP-1-1 --mode 1920x1080 --scale-from 3840x2160 --panning 3840x2160+3840+0 --right-of eDP-1
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