https://bugzilla.kernel.org/show_bug.cgi?id=221000
Bug ID: 221000
Summary: ACPI does not expose touchpad device on Honor
MagicBook 14 Pro 2025 (Intel Core Ultra 9)
Product: ACPI
Version: 2.5
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: BIOS
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Created attachment 309220
--> https://bugzilla.kernel.org/attachment.cgi?id=309220&action=edit
Full ACPI tables dump
Hardware: Honor MagicBook 14 Pro 2025 (Chinese firmware version)
CPU: Intel Core Ultra (Meteor Lake)
GPU: Intel Arc Graphics
Problem:
The internal touchpad is not detected at all by the Linux kernel.
It is completely absent from /proc/bus/input/devices.
This is not a userspace or libinput issue.
No touchpad device (ELAN/Synaptics/Goodix/PNP0C50) is visible to the kernel.
Observations:
- Under Windows, the touchpad works normally.
- On Linux, ACPI firmware does not expose the touchpad device.
- No I2C-HID or SPI-HID touchpad device is registered.
- ACPI tables do not show an active touchpad device.
- Keyboard required i8042.dumbkbd=1 to function, which suggests ACPI quirks.
Steps to reproduce:
1. Boot any modern Linux distribution.
2. Run: cat /proc/bus/input/devices
3. Observe that no internal touchpad device is present.
Expected result:
ACPI should expose the internal touchpad device so that
i2c-hid-acpi or hid-over-spi can bind to it.
Actual result:
The touchpad device is not exposed by ACPI at all.
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