acpi_ibm controls brightness, light control correctly, complete with button presses
volume control buttons control the application with focus; not the global sound mixer
minimum power consumption with low backlight and wifi disabled: approximately 11W
drm2 supports the graphics hardware with hardware OpenGL
The front-panel connector for the headphone audio is actually a separate device - and is actually device '0'; so 'sysctl hw.snd.default_unit=1' is needed to route audio to the speaker.