UserAgent: Mozilla/5.0 (X11; CrOS x86_64 9280.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3007.0 Safari/537.36
Platform: 9280.0.0 (Official Build) dev-channel cave

Steps to reproduce the problem:
No steps.  I just sent in a report from the device 2 minutes ago.

What is the expected behavior?
The touchscreen works

What went wrong?
It does not work

Did this work before? Yes 

Chrome version: 58.0.3007.0  Channel: dev
OS Version: 9280.0.0
Flash Version: Shockwave Flash 24.0 r0

After updating to Beta channel, the touch screen quit working.  It remains functionless on the latest dev release as well in both laptop and tablet modes.