I searched the WWW for any kind of solution to the trackpad not being
recognized. There are several months of similar questions, but no
resolution. Until this patch was made public/known.
Further discussion here:
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Additional initializer needed to recognize trackpad on Lenovo Yoga 720
Status in linux package in Ubuntu:
There's just a 1 line patch required, to add an initializer to array
of structs scanned to match up the device ID with driver.
The PR is here:
I've applied the patch and created and booted from a custom kernel and
it works great.
The laptop is wonderful running Ubuntu: I7 7700HQ, 16G RAM, 500G SSD,
4K touch screen, decent I/O ports.
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