Replace .txt reference with README.md for Forgejo display
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3 changed files with 147 additions and 141 deletions
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@ -7,8 +7,7 @@ the touchpad to be misclassified as "external," blocking DWT in KDE Plasma.
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## Files
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- `fix-rog-z13-trackpad.sh` — install script (run with sudo)
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- `ROG_Flow_Z13_trackpad_fix_reference.txt` — full documentation
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- `rules/99-rog-z13-touchpad.rules` — standalone copy of the udev rule
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- `README.md` — full documentation
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## System Files Created
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- `/etc/udev/rules.d/99-rog-z13-touchpad.rules` — marks touchpad as internal
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146
README.md
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146
README.md
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@ -0,0 +1,146 @@
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# ROG Flow Z13 — Touchpad DWT & Palm Rejection Fix
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Fixes the **"Disable while typing"** checkbox being greyed out in KDE Plasma
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and enables proper palm rejection on the ASUS ROG Flow Z13 folio keyboard touchpad.
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**Device:** ROG Flow Z13 (2023 & 2025 models, USB `0b05:1a30`)
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**OS:** CachyOS / Arch Linux, KDE Plasma 6, Wayland
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---
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## The Problem
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The Z13's magnetic folio keyboard connects via **USB**. Because it's detachable,
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the kernel flags the USB device as `removable`. Systemd's `65-integration.rules`
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then sets:
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```
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ID_INPUT_TOUCHPAD_INTEGRATION=external
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```
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on the touchpad. **Libinput refuses to enable Disable-While-Typing (DWT) for
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external touchpads**, so KDE greys out the checkbox.
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The libinput package ships a built-in quirk (`50-system-asus.quirks`) that marks
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the **keyboard** interface as internal, but there is no libinput quirk attribute
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to mark a **touchpad** as internal. The keyboard was handled — the touchpad was not.
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### How the folio exposes itself
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| Event | Role | Status |
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|-------|------|--------|
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| `event3` | Vendor keys | — |
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| `event4` | Keyboard | Marked internal by libinput quirk |
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| `event7` | Mouse pointer | — |
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| `event8` | **Touchpad** | 🛑 Was marked external |
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The keyboard and touchpad share the same `LIBINPUT_DEVICE_GROUP`, so they *can*
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be paired for DWT — but only if **both** are internal.
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---
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## The Fix
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### Layer 1 — Mark the keyboard as internal
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**Already handled** by the system's built-in libinput quirk at
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`/usr/share/libinput/50-system-asus.quirks`:
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```ini
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[Asus ROG FLow Z13 2025 keyboard]
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MatchUdevType=keyboard
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MatchBus=usb
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MatchVendor=0x0B05
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MatchProduct=0x1A30
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AttrKeyboardIntegration=internal
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```
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The install script also creates a local override at
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`/etc/libinput/local-overrides.quirks` as a broader catch-all for any ASUS
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USB keyboard.
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### Layer 2 — Mark the touchpad as internal
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**A udev rule** (`/etc/udev/rules.d/99-rog-z13-touchpad.rules`) overrides the
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integration type after `65-integration.rules` has already set it to `external`:
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```udev
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ACTION=="add|change", SUBSYSTEM=="input", \
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ENV{ID_VENDOR_ID}=="0b05", ENV{ID_MODEL_ID}=="1a30", \
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ENV{ID_INPUT_TOUCHPAD}=="1", \
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ENV{ID_INPUT_TOUCHPAD_INTEGRATION}="internal"
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```
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**Why this works:**
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- Runs at priority **99** (after `65-integration.rules` at priority 65)
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- Only matches the Z13 folio (`0b05:1a30`)
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- Only affects the touchpad interface (`ID_INPUT_TOUCHPAD=1`)
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- Sets `ID_INPUT_TOUCHPAD_INTEGRATION=internal`, which libinput reads at runtime
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### The result
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With both keyboard + touchpad recognized as internal:
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1. **The "Disable while typing" checkbox becomes available** in KDE System
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Settings → Touchpad
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2. **DWT activates** — the touchpad is ignored for ~300–500ms after any keypress
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3. **Palm rejection improves** — libinput applies more aggressive defaults for
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internal touchpads (larger exclusion zones, lower palm pressure thresholds)
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---
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## Usage
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```bash
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# Clone the repo
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git clone ssh://git@forgejo.fifthdread.com:223/Fifthdread/rog-z13-trackpad-fix.git
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cd rog-z13-trackpad-fix
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# Run the install script (as root)
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sudo ./fix-rog-z13-trackpad.sh
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```
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Then log out and back in. Open **System Settings → Touchpad** — the
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"Disable touchpad when typing" checkbox should now be available.
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### Reverting
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```bash
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sudo rm /etc/udev/rules.d/99-rog-z13-touchpad.rules
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sudo rm /etc/libinput/local-overrides.quirks
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sudo udevadm control --reload-rules
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sudo udevadm trigger --subsystem-match=input
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```
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---
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## Troubleshooting
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**Verify the udev rule is loaded:**
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```bash
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udevadm info --query=property /dev/input/event8 | grep INTEGRATION
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# Should show: ID_INPUT_TOUCHPAD_INTEGRATION=internal
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```
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**Verify the keyboard quirk is applied:**
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```bash
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sudo libinput quirks list /dev/input/event4
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# Should show: AttrKeyboardIntegration=internal
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```
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**Verify DWT is enabled:**
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```bash
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sudo libinput list-devices | grep -A15 "Touchpad"
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# Should show: Disable-w-typing: enabled
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```
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> Your event numbers may differ (e.g. after a kernel update). Run
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> `sudo libinput list-devices` to find the correct ones.
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---
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## References
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- [libinput Device Quirks](https://wayland.freedesktop.org/libinput/doc/latest/device-quirks.html)
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- [Linux Touchpad Dev Guide — DWT](https://linuxtouchpad.org/libinput/2022/05/07/disable-while-typing.html)
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- [libinput — Disable While Typing](https://wayland.freedesktop.org/libinput/doc/latest/configuration.html#disable-while-typing)
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@ -1,139 +0,0 @@
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ROG Flow Z13 — Touchpad Palm Rejection / DWT Fix
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==================================================
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Created: 2026-05-13
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Device: ASUS ROG Flow Z13 (folio keyboard, USB 0b05:1a30)
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OS: CachyOS (Arch Linux)
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KDE: Plasma 6 (Wayland)
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Issue: "Disable while typing" checkbox greyed out in Touchpad settings
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=====================================================================
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PROBLEM SUMMARY
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=====================================================================
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The ROG Flow Z13's magnetic folio keyboard connects via USB. Since it's
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a detachable keyboard, the kernel marks the USB device as "removable."
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Systemd's 65-integration.rules uses this to set:
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ID_INPUT_TOUCHPAD_INTEGRATION=external
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on the touchpad. Libinput refuses to enable "Disable While Typing" (DWT)
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for external touchpads, and KDE respects this by greying out the checkbox.
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The libinput quirks system ships a quirk (50-system-asus.quirks) that
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marks the KEYBOARD interface as internal, but there is no libinput quirk
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attribute to mark a TOUCHPAD as internal — so the touchpad remained
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external despite the keyboard being correctly handled.
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The USB device exposes these input nodes:
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event3 — Vendor keys (HID interface 1.0)
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event4 — Keyboard (HID interface 1.2) ← quirk marks internal
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event7 — Mouse (HID interface 1.3)
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event8 — Touchpad (HID interface 1.3) ← was marked external
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Both keyboard and touchpad share the same LIBINPUT_DEVICE_GROUP, so
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they *can* be paired for DWT — but only if both are internal.
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=====================================================================
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FILES INVOLVED
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=====================================================================
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1. /usr/share/libinput/50-system-asus.quirks [SYSTEM — do not edit]
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----------------------------------------------------------------
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The libinput package ships this file. It includes a quirk:
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[Asus ROG FLow Z13 2025 keyboard]
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MatchUdevType=keyboard
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MatchBus=usb
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MatchVendor=0x0B05
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MatchProduct=0x1A30
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AttrKeyboardIntegration=internal
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This correctly marks the keyboard interface as internal, but since
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MatchUdevType=keyboard, it does not affect the touchpad.
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This file is overwritten on libinput updates. Do not modify it.
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2. /etc/libinput/local-overrides.quirks [USER — was already present]
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----------------------------------------------------------------
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A broader local override that matches all ASUS USB keyboards:
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[ASUS ROG Flow Z13 All USB Keyboards]
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MatchUdevType=keyboard
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MatchBus=usb
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MatchVendor=0x0B05
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AttrKeyboardIntegration=internal
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This is redundant with the system quirk above (it's less specific
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since it matches any ASUS keyboard product ID). It's harmless and
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can be kept or removed — the system quirk alone is sufficient for
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the keyboard side. If kept, it serves as a catch-all for future
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ASUS folio keyboards with different product IDs.
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3. /etc/udev/rules.d/99-rog-z13-touchpad.rules [USER — NEW, created for fix]
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----------------------------------------------------------------
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The actual fix. This udev rule overrides the touchpad's integration
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type from "external" to "internal":
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ACTION=="add|change", SUBSYSTEM=="input", \
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ENV{ID_VENDOR_ID}=="0b05", ENV{ID_MODEL_ID}=="1a30", \
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ENV{ID_INPUT_TOUCHPAD}=="1", \
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ENV{ID_INPUT_TOUCHPAD_INTEGRATION}="internal"
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How it works:
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- Matches input events from the Z13 folio (USB 0b05:1a30)
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- Only affects touchpad devices (ID_INPUT_TOUCHPAD=1)
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- Runs after systemd's 65-integration.rules (which set it to "external")
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- Changes ID_INPUT_TOUCHPAD_INTEGRATION to "internal"
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Libinput picks up this udev property at runtime, which:
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a) Unlocks the "Disable while typing" checkbox in KDE
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b) Enables DWT behavior (touchpad ignored ~300-500ms after keypress)
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c) Enables libinput's more aggressive palm rejection defaults for
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internal touchpads (larger exclusion zones, lower palm thresholds)
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=====================================================================
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REVERTING
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=====================================================================
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To undo the fix, delete the udev rule and reload:
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sudo rm /etc/udev/rules.d/99-rog-z13-touchpad.rules
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sudo udevadm control --reload-rules && sudo udevadm trigger
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The keyboard quirks files can remain as-is — they only affect the
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keyboard and don't cause issues on their own.
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Optionally also remove:
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sudo rm /etc/libinput/local-overrides.quirks
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=====================================================================
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TROUBLESHOOTING
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=====================================================================
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If DWT still doesn't work after applying:
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1. Verify the udev rule is loaded:
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udevadm info --query=property /dev/input/event8 | grep INTEGRATION
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Should show: ID_INPUT_TOUCHPAD_INTEGRATION=internal
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2. Verify the keyboard quirk is applied:
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sudo libinput quirks list /dev/input/event4
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Should show: AttrKeyboardIntegration=internal
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3. Verify both devices are recognized:
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sudo libinput list-devices | grep -A15 "Touchpad"
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Should show: Disable-w-typing: enabled
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4. If you changed the event number (e.g. after a kernel update), re-check:
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sudo libinput list-devices
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Look for your touchpad and keyboard event numbers, then re-verify.
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=====================================================================
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REFERENCES
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=====================================================================
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- libinput Device Quirks: https://wayland.freedesktop.org/libinput/doc/latest/device-quirks.html
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- Linux Touchpad Dev Guide: https://linuxtouchpad.org/libinput/2022/05/07/disable-while-typing.html
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- libinput DWT docs: https://wayland.freedesktop.org/libinput/doc/latest/configuration.html#disable-while-typing
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