I have the same laptop and the same problem appeared after upgrade to ascii. Since it appears to be a bug in the intel video driver, I tried booting an older kernel and the problem has not yet shown up (though  I have only been running it a couple of hours).
I simply booted the kernel I was using for  jessie, which is still in the grub menu. In my case that is "4.9.0-0.bpo.4-amd64", from jessie backports.