Augustin Berisa

Ok doesn't seems to be the issue. It's more likely Xorg server related. I have just found that switching my monitor output crashes it as well which is crazy.

Could you try this? https://github.com/elementary/greeter/issues/166#issuecomment-437144185 It's probably the same issue with nvidia drivers distributed by ubuntu.

@kgrubb @Ikki-Dai @yucefsourani Does this happen after wakeup? Are you using nvidia-340 from ubuntu repository?

> I'm getting something similar I believe. On an alienware m11x r2, using the proprietary nvidia-340 driver, as soon as the laptop goes into suspend, the screen begins blinking on...

@kgrubb I really don't know if provider of that PPA patch it or not. You could just try it. If the issue will still persist use the one I have...

So I have tested nvidia-340 driver from PPP graphics-drivers and has same issues as the one from ubuntu repos.

You could try also this one which works good. It's only slightly patched so DKMS auto builds should work until kernel 4.18: `curl -o https://nvidia.if-not-true-then-false.com/NVIDIA-Linux-x86_64-340.107-patched.run `