2015 rMBP screen goes black for a second


hi,

noticing screen on 2015 rmbp go black second every once , while. similar when plug in external monitor , screen goes black second before directing output monitor. exhibiting behavior when surfing web, running applications, etc. happens maybe once day or so, , cannot detect pattern based on usage.

ideas.
 

i have exact same problem 15" 2015 dgpu. i've noticed happens when computer switches between graphics cards, it's not reproducible every time.
 


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