UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36
Platform: Acer c720p i3-4005U (peppy)

Steps to reproduce the problem:
In the latest version of ChromeOS, the scratchpad becomes extremely unresponsive when a power adapter is plugged in.  You can sometimes move the cursor with the scratchpad, but mostly just horizontally, and clicking occurs at random times and places.  90% of your gestures are lost.  It's like the power supply charging control SW is creating so many CPU interrupts that 80% of the scratchpad interrupts are lost.

If you unplug the power adapter, the scratchpad works perfectly again.  This is a very high-profile problem in a very widely deployed and popular platform, there are perhaps a quarter of a million of this model of chromebook deployed.

I filed a bug report (couldn't use the mouse and it was very difficult, but I managed to get it reported), but it has not yet shown up in crbug.com.

Bug is completely reproduce-able (just plug in the power and unplug it, the bug always happens when the power is plugged in and btw the screen brightens to prove that) and the OS Version is 63.0.3239.140 (Official Build) (64-bit)

- Don Gillies
Data Ingestion SRE, Google

What is the expected behavior?
Scratchpad should not be affected by the charging circuit.

What went wrong?
Scratchpad got jumpy.

Did this work before? Yes The most recent version of the operating system (i.e. yesterday or the day before)

Chrome version: 63.0.3239.132  Channel: stable
OS Version: 10032.86.0
Flash Version: