The problem is solved installing skylake graphics microcode from 01.org and installing xserver-xorg-video-intel. Details can be found here: https://wiki.debian.org/InstallingDebianOn/Thinkpad/X1%20Carbon%204thGen %20PCIe_SSD/jessie
The problem is solved installing skylake graphics microcode from 01.org and installing xserver-xorg-video-intel. Details can be found here: https://wiki.debian.org/InstallingDebianOn/Thinkpad/X1%20Carbon%204thGen %20PCIe_SSD/jessie