Comment 46 for bug 1731911

I think I'm experiencing the same problem. I installed Ubuntu 18.04 beta last Tuesday. When I power on my computer, the screen blinks 50-53 times over the span of 2-1/2 minutes (this is perfectly reproducible) and then for the rest of the session, everything works flawlessly. After LinuxFest Northwest, I was told to do an apt dist-upgrade and that did not clear the problem.

I have two video cards:
VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller (rev 09)
VGA compatible controller: NVIDIA Corporation GF108 [GeForce GT 430] (rev a1)

I'm not sure what other information would be helpful.