PulseGesture

Install runtime tools

The visible gesture trail on Wayland requires XWayland. Installing the same tool set in an X11 session is harmless.

sudo apt update
sudo apt install xwayland xdg-utils unzip

Join the input group

Create the input group if needed, then add your current user to it.

getent group input >/dev/null || sudo groupadd --system input
sudo usermod -aG input "$USER"

Enable uinput

Load the kernel module now and configure it to load automatically after future boots.

sudo modprobe uinput
echo uinput | sudo tee /etc/modules-load.d/pulse-gesture.conf >/dev/null
ls -l /dev/uinput

Install udev rules

Add the device identity and access rules, then reload and apply them with udev.

/etc/udev/rules.d/69-pulse-gesture.rules

sudo tee /etc/udev/rules.d/69-pulse-gesture.rules >/dev/null <<'EOF'
ACTION!="remove", SUBSYSTEM=="input", KERNEL=="event*", ATTRS{phys}=="pulse-gesture/*", ATTRS{id/bustype}=="0003", ENV{ID_BUS}="usb"
ACTION!="remove", SUBSYSTEM=="input", KERNEL=="event*", ATTRS{phys}=="pulse-gesture/*", ATTRS{id/bustype}=="0005", ENV{ID_BUS}="bluetooth"
EOF

/etc/udev/rules.d/99-pulse-gesture.rules

sudo tee /etc/udev/rules.d/99-pulse-gesture.rules >/dev/null <<'EOF'
KERNEL=="event*", SUBSYSTEM=="input", MODE="0660", GROUP="input"
KERNEL=="uinput", SUBSYSTEM=="misc", MODE="0660", GROUP="input", OPTIONS+="static_node=uinput"
EOF

sudo udevadm control --reload-rules
sudo udevadm trigger --subsystem-match=input --action=change
sudo udevadm trigger --subsystem-match=misc --action=change
sudo udevadm settle

Restart the system

New group membership does not affect the current session. Rebooting is the most reliable option.

sudo reboot

Check the desktop session

X11: XDG_SESSION_TYPE should be x11 and DISPLAY must not be empty.

printf 'session=%s\ndisplay=%s\n' "$XDG_SESSION_TYPE" "$DISPLAY"

Wayland: WAYLAND_DISPLAY and DISPLAY must both be present, and XWayland must be running or available on demand.

printf 'session=%s\nwayland=%s\ndisplay=%s\n' \
  "$XDG_SESSION_TYPE" "$WAYLAND_DISPLAY" "$DISPLAY"
pgrep -a Xwayland || true