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The touchpad works, but when you press the button to dissable it, it will be disabled until the next reboot, you will not be able to reenable the touchpad, although the indicator light will still turn on and off.
The special “P” button doesn't present a key event to `xev`.
Increasing screen brightness via the key combo Fn+up results in the desired screen brightness change, and in addition will print a plus-or-minus ascii character (±).
Everything else seems to work flawlessly.