MacBook Pro (15-inch, 2016) graphic card issues First of all this is my hardware:


When i power on my new mac book pro (with touch bar) i figured out a strange problem (i think is related with my graphic card). 

This is the procedure to get that issue:


Power on my mac
Type my credentials
the first window i open (in this case the "spotlight" window) appears in this way:

There are a lot of white pixel ...
Then if i close the spotlight window and i open again that problem disappear.


If i restart my mac i don't have this problem. It only happen if i shut down my mac and then power on it again. In this example i used "spotlight" but happen the same with the "Finder" app.

---EDIT---  

My GPU:


Intel HD Graphics 530
Radeon Pro 450


Yes i have this issue on my interal display (external monitor never used).

---EDIT 2---
SMCand NVRAMdidn't fix the problem. 

---EDIT 3---
After many call to "Apple Care" they figured out that my mac book pro has some hardware issues. They offer to me a substitution. Of course i said yes. In 2 weeks they will send to me a new one.
That does seem a little strange. As a starting point it may be worth resetting both your SMC and NVRAM. Instructions follow.

Resetting the SMC on your particular MBP


Shut down your computer
Keep the power cable plugged in
Press at the same time shiftoptioncontrol (on the left side of the keyboard) and the power button
Let go
Turn your computer back on with the power button.


Resetting the NVRAM on Late-2016 MacBook Pro models

For all Late-2016 MacBook Pro models (with and without Touch Bar) follow these steps:


Shut down your machine. Yes, a full shut down, not just logging out.
Press the power button and then immediately press the commandoptionpr keys. 
Keep these keys pressed down for at least 20 seconds!
Let go of the keys and let your Mac reboot normally.


Note: When you log back in you may need to readjust some of your system preferences (e.g. speaker volume, screen resolution, startup disk selection, time zone information, etc).

Once you've tried these, let us know how you go.