Laptop external monitor looks looks awful after I close the t460p lid !!!!!

This thread has a lot of details, but the most important thing can be summarized in one paragraph.

Everything seems perfect now.   It appears Windows 10 just needs to be in put in extend screen for a few minutes while each monitor is configured.  After that it is ok to revert to duplicated screens, and windows 10 still knows the resolution of each screen.

------- if you are interested in more details, read on -------------------

I have given up on getting my windows 10 laptop to display nicely on an external 2220wm monitor.  (see previous question

So I bought a new AOc  E2252Sw which has a wider screen (1920 x 1080).  

with my t460p laptop lid open I did the following:
I used start > settings > display
The resulting dialog showed a  single "monitor picture" at the top  with "1/2". (this indicated that the display was duplicated across both monitors).

I changed the resolution to 1920x1880 (recommended)  and both monitor looked GREAT!.

But, if I closed the laptop lid, the external monitor looked TERRIBLE. If I opened the lid, both screens looked great. I repeated that several times before I convinced myself I wasn't crazy.

To resolve the problem, I switched the display dialog from "duplicate these displays" to  "extend these displays".

Now the dialog shows two "monitor boxes" 1) t460p on the left    2) e2252Sw on the right.

I clicked on  e2252Sw then set it to be main display with 100% (recommended) and 1920x1080 (recommended)
I clicked on t460p and set it to be 200%(recommend) and 2560x1440(recommended)

Both screens looked GREAT.  I closed the lid and external monitor STILL LOOKED GREAT.

But, that still was not perfect.  Two independent screens allows the Icons can be spread out over both screens.  Closing the lid cause all the icons to be consolidate onto the external monitor, and there really isn't room for them.  So, I reverted back to duplicate these displays.

Everything seems perfect now.   It appears Windows 10 just needs to be in put in extend screen for a few minutes while each monitor is configured.  After that it is ok to revert to duplicated screens, and windows 10 still knows the resolution of each screen.

I am going to leave this "question" open for a few days in case somebody has some useful comments. I will then close it.
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rberkeConsultantAsked:
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Jackie ManCommented:
I am going to leave this "question" open for a few days in case somebody has some useful comments. I will then close it.

You should delete this question if no one can give you an answer you like.

I changed the resolution to 1920x1880 (recommended)  and both monitor looked GREAT!.

Who recommend you to do the above? You should set your t460p to display in 1920x1080 resolution.

There is nothing crazy about what you see. You close the laptop lid and your external monitor will become the primary monitor and your notebook should be using a GPU which is not compatible with win 10 1709 version and it explains the crazy screen you see.
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QlemoBatchelor, Developer and EE Topic AdvisorCommented:
Correct, with duplicate screens you need to keep the resolution the same for both displays. Because the least resolution available determines what is used. As soon as you remove the lower resolution display, the originally set resolution is re-set.
If you keep both the same, it doesn't matter whether your external monitor is connected or not, or the lid is closed. The resolution is kept the same all the time.
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rberkeConsultantAuthor Commented:
My apologies to Jackie Man: The 1920x1880 was a typographical error on my part.  It should have said 1920x1080.

Qlemo said
"If you keep both the same, it doesn't matter whether your external monitor is connected or not, or the lid is closed. The resolution is kept the same all the time."

Right this minute, what Qlmo said is absolutely TRUE for my current configuration.  Closing lid makes no difference.

But that was NOT TRUE in my initial configuration. As I said in my initial post:

"If I closed the laptop lid, the external monitor looked TERRIBLE. If I opened the lid, both screens looked great. I repeated that several times before I convinced myself I wasn't crazy."

And I have proof !!! If you review this previous question you will see pictures that prove closing a lid sometimes causes scaling to change even when screens are duplicated.

So I have contradictory behavior between initial setup and now.

But, I have a theory.  I think the funky lid closing behavior occurred  because this is a newer laptop that had never ever used Extended Screens.  I think that just using the extended screen a single time somehow fixed the problem forever ????

But, I have spent way too much problem on this. I will close the question and award most of the points to Qlemo because he correctly described the current behavior.  

Some points to Jackie Man because he pointed out my typographical error.
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rberkeConsultantAuthor Commented:
thanks
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