UserAgent: Mozilla/5.0 (X11; CrOS armv7l 8172.47.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.79 Safari/537.36
Platform: 8172.47.0 (Official Build) stable-channel nyan_blaze

Steps to reproduce the problem:
1. Boot-up
2. Wait few minutes
3. That's it

What is the expected behavior?
Trackpad shall not freeze

What went wrong?
Since last stable upgrade 51.0.2704.79, Chrome OS (on HP Chromebook 14-x003nf) makes trackpad freezing few minutes after bootup. No recovery identified expect reboot. Keyboard is not impacted.

Did this work before? Yes Before last stable upgrade 51.0.2704.79

Chrome version: 51.0.2704.79  Channel: stable
OS Version: 8172.47.0
Flash Version: Shockwave Flash 21.0 r0