With update to kernel 4.5 when I log off my desktop environment (xfce) and I go to Lightdm, the screen flickers.
Reverting to kernel 4.4.8 solves the issue. To my knowledge the acpi management has been rewritten in kernel 4.5.x.
So I suspect that there is an interaction between intel driver and the new kernel.
Driver xf86-video-intel-git 2.99.917.640.gbca4e0e-1
Thanks in advance
Please add drm.debug=14 module parameter and attach dmesg from boot to the problem.
Timeout, closing. Too little information.