ROG Flow Z13 — Touchpad DWT & Palm Rejection Fix

Fixes the "Disable while typing" checkbox being greyed out in KDE Plasma and enables proper palm rejection on the ASUS ROG Flow Z13 folio keyboard touchpad.

Device: ROG Flow Z13 (2023 & 2025 models, USB 0b05:1a30)
OS: CachyOS / Arch Linux, KDE Plasma 6, Wayland

The Problem

The Z13's magnetic folio keyboard connects via USB. Because it's detachable, the kernel flags the USB device as removable. Systemd's 65-integration.rules then sets:

ID_INPUT_TOUCHPAD_INTEGRATION=external

on the touchpad. Libinput refuses to enable Disable-While-Typing (DWT) for external touchpads, so KDE greys out the checkbox.

The libinput package ships a built-in quirk (50-system-asus.quirks) that marks the keyboard interface as internal, but there is no libinput quirk attribute to mark a touchpad as internal. The keyboard was handled — the touchpad was not.

How the folio exposes itself

Event	Role	Status
`event3`	Vendor keys	—
`event4`	Keyboard	Marked internal by libinput quirk
`event7`	Mouse pointer	—
`event8`	Touchpad	🛑 Was marked external

The keyboard and touchpad share the same LIBINPUT_DEVICE_GROUP, so they can be paired for DWT — but only if both are internal.

The Fix

Layer 1 — Mark the keyboard as internal

Already handled by the system's built-in libinput quirk at /usr/share/libinput/50-system-asus.quirks:

[Asus ROG FLow Z13 2025 keyboard]
MatchUdevType=keyboard
MatchBus=usb
MatchVendor=0x0B05
MatchProduct=0x1A30
AttrKeyboardIntegration=internal

The install script also creates a local override at /etc/libinput/local-overrides.quirks as a broader catch-all for any ASUS USB keyboard.

Layer 2 — Mark the touchpad as internal

A udev rule (/etc/udev/rules.d/99-rog-z13-touchpad.rules) overrides the integration type after 65-integration.rules has already set it to external:

ACTION=="add|change", SUBSYSTEM=="input", \
  ENV{ID_VENDOR_ID}=="0b05", ENV{ID_MODEL_ID}=="1a30", \
  ENV{ID_INPUT_TOUCHPAD}=="1", \
  ENV{ID_INPUT_TOUCHPAD_INTEGRATION}="internal"

Why this works:

Runs at priority 99 (after 65-integration.rules at priority 65)
Only matches the Z13 folio (0b05:1a30)
Only affects the touchpad interface (ID_INPUT_TOUCHPAD=1)
Sets ID_INPUT_TOUCHPAD_INTEGRATION=internal, which libinput reads at runtime

The result

With both keyboard + touchpad recognized as internal:

The "Disable while typing" checkbox becomes available in KDE System Settings → Touchpad
DWT activates — the touchpad is ignored for ~300–500ms after any keypress
Palm rejection improves — libinput applies more aggressive defaults for internal touchpads (larger exclusion zones, lower palm pressure thresholds)

Usage

# Clone the repo
git clone ssh://git@forgejo.fifthdread.com:223/Fifthdread/rog-z13-trackpad-fix.git
cd rog-z13-trackpad-fix

# Run the install script (as root)
sudo ./fix-rog-z13-trackpad.sh

Then log out and back in. Open System Settings → Touchpad — the "Disable touchpad when typing" checkbox should now be available.

Reverting

sudo rm /etc/udev/rules.d/99-rog-z13-touchpad.rules
sudo rm /etc/libinput/local-overrides.quirks
sudo udevadm control --reload-rules
sudo udevadm trigger --subsystem-match=input

Troubleshooting

Verify the udev rule is loaded:

udevadm info --query=property /dev/input/event8 | grep INTEGRATION
# Should show: ID_INPUT_TOUCHPAD_INTEGRATION=internal

Verify the keyboard quirk is applied:

sudo libinput quirks list /dev/input/event4
# Should show: AttrKeyboardIntegration=internal

Verify DWT is enabled:

sudo libinput list-devices | grep -A15 "Touchpad"
# Should show: Disable-w-typing: enabled

Your event numbers may differ (e.g. after a kernel update). Run sudo libinput list-devices to find the correct ones.

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