Hi John Paul Adrian Glaubitz,
Nothing from your syslog excerpt indicates a problem with your X server.
> Yep, but it was just a supposition.
Is there a reason why you are using Debian pre-release kernel? The official
kernel for Debian Stretch and Sid is still based on the 4.9 series.
> Yep, i know, it's just for try. Even with 4.9 kernel i have the problem.
Did you actually verify that your machine crashed? What about logging in
through SSH over the network? Just because the screen is black doesn't
mean the machine actually crashed.
> Ok i have SSH access with my black screen but keyboard don't work (CTRL + ALT + MAJ + SYS + B)
thank you