yoga-usage-mode

ACPI driver Linux kernel module for Lenovo Yoga usage mode sensor to detect whether the device is in tablet or laptop mode. Creates an input device reporting SW_TABLET_MODE which libinput uses to disable keyboard and touchpad when tablet mode is entered; can also be used with https://github.com/alesguzik/linux_detect_tablet_mode.

This module has been reported to work at least with the following models:

• IdeaPad Flex 14API
• Yoga 6 13ALC6
• Yoga 6 13ALC7
• Yoga C940-14IIL

Arch Linux users can install this using the AUR package yoga-usage-mode-dkms-git.

Usage:

• make to build
• make load as root to load the module for testing
• make unload as root to unload the module
• make install as root to install

Add yoga-usage-mode to e.g. /etc/modules-load.d/modules.conf to load automatically.

Reconstructing the WMI interface (see c940.mof) was done using https://github.com/pali/bmfdec.