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Lower portion of the screen flickers for a split second every once in a while


macrumors member
Original poster
Jul 5, 2016
Bought a 15 inch 2017 MBP and am running High Sierra PB2 on it. The few days I've had it I had, very spontaneously, the lower third of the screen glitch out for a split second. I can't even tell what happens because its so quickly. Its not artifacting it just seems like the pixels shift really really shortly.

I am not sure if I should be concerned it might be a hardware issue or if its just software based.

Again, theres no irregular behaviour other than that. I don't get any artifacts or other display errors. I can't even repeat the error. Sometimes it will happen after an hour, sometimes it won't happen for 8 hours. I do think it mostly happened while I was using safari.

Has anyone else encountered this? Could it be related to automatic switching between iGPU and dGPU?
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