Comment 10 for bug 1675830

I would recommend you try this staging PPA - https://launchpad.net/~canonical-x/+archive/ubuntu/x-staging

it brings the latest X stack - if it resolves your issues please report that fact here on the bug report tracking the request to bring this X stack to zesty:

https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1671799