I disabled virtual keyboard &floating virtual keyboard flag, this issue still repro;

and not repro for another clapper device, 

will check it in next version;

Change to another clapper device , with canary or dev latest version, crash still repro;

I will try to previous canary build to check this issue;

I checked several canary previous versions, 5/11 's 10666 canary build is ok , next build (10669 canary build in 5/12 ) can repro this freeze issue;can not input anything again;

Wait for a while, display black screen, system have no any response;

Noticed issue 842512, not sure whether they are related.

Check this issue in 68.0.3431.0, 10682 canary clapper build, not repro;

I cannot repro this on my Pixel device with build 10681. Suspecting this is a device specific issue (e.g. related to HW/driver stuff).

zhangyu@, can you please help to verify whether 10681 has fixed the issue on clapper device? Thanks.

This issue not repro in 10682 clapper ;