Lenovo Yoga 13 touchpad regression

[H. Peter Anvin]

Hello,

The touchpad on Lenovo Yoga 13 seems to have broken some time between 
3.4 and the current kernel.  The dmesg is full of spewage:

[  256.246481] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it 
known.
[  256.251473] atkbd serio0: Unknown key released (translated set 2, 
code 0xbe on isa0060/serio0

... about once per second; I am wondering if the touchpad is spewing 
output onto the keyboard channel or if there is something else wrong.

I have tried i8042.nomux and i8042.noloop to no effect.

Unless someone has a better idea I'll try to do a bisect.

	-hpa
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