[Bug 221311] New: ASUS Zenbook S 16 UM5606WA — Touchpad (ELAN1010) becomes unresponsive due to EC state corruption

bugzilla-daemon
2026-04-02T09:58:17Z

https://bugzilla.kernel.org/show_bug.cgi?id=221311

Bug ID: 221311
Summary: ASUS Zenbook S 16 UM5606WA — Touchpad (ELAN1010)
becomes unresponsive due to EC state corruption
Product: Drivers
Version: 2.5
Hardware: AMD
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: Platform_x86
Assignee: drivers_platform_x86@kernel-bugs.osdl.org
Reporter: david@flyboard.ai
Regression: No

Created attachment 309800
--> https://bugzilla.kernel.org/attachment.cgi?id=309800&action=edit
dmesg, acpidump, DSDT disassembly, and full ACPI analysis for ELAN1010 touchpad
failure on UM5606WA

On the ASUS Zenbook S 16 UM5606WA (BIOS 318, kernel 6.19.8-200.fc43.x86_64, AMD
Ryzen AI 9 HX 370), the ELAN1010 I2C touchpad intermittently becomes
unresponsive.

The ACPI _STA method for \_SB.I2CC.ETPD returns 0, so i2c-hid-acpi never binds.
The Fn+F7 touchpad toggle hotkey has no effect (no OSD, no EC event). A warm
reboot does not fix it — only a full shutdown (power-off) restores the touchpad
by resetting the EC.

The _STA logic gates on two EC/firmware variables (TPIF and DSYN) that appear
to get corrupted during normal use. No user action triggered the failure.

The DSDT also has pre-existing errors: duplicate named objects on
\_SB.PCI0.GPP4 (_S0W, _PR0, _PR3).

Full ACPI analysis, dmesg, DSDT disassembly, and acpidump attached.

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