Comment 15 for bug 1641593

Thanks for the update. That would make it difficult to know if this is a regression, or if this bug always existed.

It might be worth while testing the latest Xenial kernel in -proposed:
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/11278866

The 4.9-rc7 kernel is now also available, and might be worth testing. It is available from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9-rc7/