Then check /sys/devices/platform/thinkpad_acpi/ for hotkey_tablet_mode or volume_mute .
The you are currently running (e.g., Windows 10 64-bit, Windows 11) acpi ibm0068
If you have recently reinstalled Windows, upgraded your operating system, or simply checked your Device Manager, you might have encountered an "Unknown Device" under the section with the Hardware ID ACPI\IBM0068 . Windows 10 64-bit